#634D01
Closest named color: Olive Brown (#645403). oklch(43.1% 0.088 89.6), rgb(99, 77, 1).
Aa
White text reads best on this color (8.10:1).
About this color
#634D01 is a dark, moderately saturated brown. In OKLCH its lightness is 43%, its chroma 0.088 and its hue 90°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.021 away. White text reads best on it, at 8.10:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.088) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.59:1 |
| White text | 8.10:1 |
Values
| HEX | #634D01 |
| RGB | rgb(99, 77, 1) |
| HSL | hsl(47, 98%, 20%) |
| OKLCH | oklch(43.1% 0.088 89.6) |
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 #634D01 | 8.10:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #634D01 | 2.59:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #634D01 text on white | 8.10:1 | AAA | Lc 87.9 | Fine for body text |
| #634D01 text on black | 2.59:1 | Fails | Lc -14.3 | 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
#F7F5F0
oklch(97% 0.007 88.6)
-
Step 100
100
#EEEADF
oklch(93.7% 0.015 90.2)
-
Step 200
200
#E0D9C4
oklch(88.5% 0.029 91.7)
-
Step 300
300
#CEC09B
oklch(81% 0.052 89.8)
-
Step 400
400
#B59F64
oklch(70.8% 0.082 89.8)
-
Step 500
500
#A28635
oklch(63% 0.105 89.8)
-
Step 600
600
#8D6F00
oklch(55.5% 0.113 89.9)
-
Step 700
700
#775D00
oklch(49.1% 0.1 89.6)
-
Step 800
800 (this color)
#634D01
oklch(43.1% 0.088 89.6)
-
Step 900
900
#503F0E
oklch(37.6% 0.068 88.8)
-
Step 950
950
#2F250B
oklch(27% 0.043 88.1)
#634D01 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) | #584C00 | 0.021 |
| Deuteranopia (no green cones) | #5D5207 | 0.017 |
| Tritanopia (no blue cones) | #6C4540 | 0.079 |
| Achromatopsia (no color) | #505050 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634D01
#634D01
oklch(43.1% 0.088 89.6)
- #3D4D80
#3D4D80
oklch(43.2% 0.087 269.4)
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 #634D01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.021
- Mud Brown #60460F ΔE 0.025
- Green Brown #544E03 ΔE 0.027
- Mud #735C12 ΔE 0.054
- Army Green #4B5D16 ΔE 0.056
- Medium Brown #7F5112 ΔE 0.056
- Greeny Brown #696006 ΔE 0.057
- Milk Chocolate #7F4E1E ΔE 0.059
Use #634D01 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.