#644F15
Closest named color: Olive Brown (#645403). oklch(43.8% 0.079 88.1), rgb(100, 79, 21).
Aa
White text reads best on this color (7.86:1).
About this color
#644F15 is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.079 and its hue 88°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.020 away. White text reads best on it, at 7.86:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.079) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.67:1 |
| White text | 7.86:1 |
Values
| HEX | #644F15 |
| RGB | rgb(100, 79, 21) |
| HSL | hsl(44, 65%, 24%) |
| OKLCH | oklch(43.8% 0.079 88.1) |
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 #644F15 | 7.86:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #644F15 | 2.67:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #644F15 text on white | 7.86:1 | AAA | Lc 87.2 | Fine for body text |
| #644F15 text on black | 2.67:1 | Fails | Lc -14.9 | Not readable |
Tints and shades
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
#F7F5F1
oklch(97.1% 0.006 84.6)
-
Step 100
100
#EDEAE0
oklch(93.7% 0.014 93)
-
Step 200
200
#E0D9C7
oklch(88.6% 0.025 89.2)
-
Step 300
300
#CDC09F
oklch(81% 0.047 89.1)
-
Step 400
400
#B49E6B
oklch(70.7% 0.073 87.2)
-
Step 500
500
#A18641
oklch(63.1% 0.094 88.1)
-
Step 600
600
#8C6F1E
oklch(55.6% 0.102 88)
-
Step 700
700
#775D0E
oklch(49.1% 0.095 88.4)
-
Step 800
800 (this color)
#644F15
oklch(43.8% 0.079 88.1)
-
Step 900
900
#4F3F17
oklch(37.6% 0.061 87.2)
-
Step 950
950
#2E250F
oklch(26.9% 0.038 87.5)
#644F15 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) | #594E0C | 0.022 |
| Deuteranopia (no green cones) | #5E5418 | 0.017 |
| Tritanopia (no blue cones) | #6D4743 | 0.071 |
| Achromatopsia (no color) | #525252 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F15
#644F15
oklch(43.8% 0.079 88.1)
- #3F507E
#3F507E
oklch(43.9% 0.079 267.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #644F15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.020
- Mud Brown #60460F ΔE 0.027
- Green Brown #544E03 ΔE 0.033
- Mud #735C12 ΔE 0.049
- Medium Brown #7F5112 ΔE 0.051
- Milk Chocolate #7F4E1E ΔE 0.052
- Greeny Brown #696006 ΔE 0.054
- Army Green #4B5D16 ΔE 0.056
Use #644F15 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.