Olive Brown #645403

Olive Brown is a dark, moderately saturated brown with hex code #645403 and RGB rgb(100, 84, 3).

White text reads best on this color (7.46:1).

About this color

#645403 is a dark, moderately saturated brown. In OKLCH its lightness is 45%, its chroma 0.091 and its hue 96°. Its hue sits on the warm side of the wheel. It is the named color Olive Brown. White text reads best on it, at 7.46:1.

Hue family	Browns
Lightness	dark (45%)
Chroma	moderately saturated (0.091)
Temperature	warm
Nearest name	Olive Brown
Black text	2.81:1
White text	7.46:1

Colors that go with Olive Brown

Matches found by rotating Olive Brown around the OKLCH hue wheel, each labelled with the closest name in our list.

Complementary

The opposite hue (180°).

Twilight #484F87

Open the complementary palette in the generator

Analogous

Neighbouring hues, 30° either side.

Open the analogous palette in the generator

Triadic

Three hues spaced 120° apart.

Open the triadic palette in the generator

Color palettes with Olive Brown

Curated color palettes that contain a color within ΔE 0.06 (OKLab) of Olive Brown, closest first.

Similar named colors

The eight named colors closest to Olive Brown, with their ΔE distance.

More about Olive Brown

How to make Olive Brown

A starting recipe from common paint colors, found with a spectral paint model (the color mixer’s paint mode). Real pigments vary, so mix a small test batch and adjust.

2 parts brown
1 part green

Recipe result: #5F532B, a difference of ΔE 0.031 from Olive Brown. That is close; add a little more of one paint to match.

What colors make brown? | Color mixing chart

Codes for Olive Brown in every format

HEX	#645403
RGB	rgb(100, 84, 3)
HSL	hsl(50, 94%, 20%)
OKLCH	oklch(44.9% 0.091 96.1)

Contrast

WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.

Pair	WCAG 2	Result	APCA	APCA guidance
White text on #645403	7.46:1	AAA	Lc -90.6	Preferred for body text
Black text on #645403	2.81:1	Fails	Lc 18.2	Dividers and decoration only
#645403 text on white	7.46:1	AAA	Lc 85.8	Fine for body text
#645403 text on black	2.81:1	Fails	Lc -16.2	Dividers and decoration only

Shades and tints of Olive Brown

A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.

Step 50
50

#F7F5F0

oklch(97% 0.007 88.6)
Step 100
100

#EDEADF

oklch(93.6% 0.015 94.2)
Step 200
200

#DFD9C4

oklch(88.4% 0.029 93.8)
Step 300
300

#CAC19A

oklch(80.8% 0.053 96.6)
Step 400
400

#B0A161

oklch(70.7% 0.086 96.5)
Step 500
500

#9D8931

oklch(63.1% 0.109 96.2)
Step 600
600

#877200

oklch(55.5% 0.114 96.2)
Step 700
700

#726000

oklch(49.2% 0.101 96.3)
Step 800
800 (this color)

#645403

oklch(44.9% 0.091 96.1)
Step 900
900

#4D410B

oklch(37.7% 0.071 95.8)
Step 950
950

#2D2609

oklch(26.9% 0.045 95.6)

Export this scale for Tailwind in the Tailwind colors tool

Olive Brown with color blindness

Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.

Vision	Seen as	Shift (ΔE)
Protanopia (no red cones)	#5E5200	0.013
Deuteranopia (no green cones)	#62570A	0.009
Tritanopia (no blue cones)	#6D4C47	0.085
Achromatopsia (no color)	#555555	0.091

Use Olive Brown in your product

Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.

Build a color system from this color Generate a palette