#631F00
Closest named color: Reddy Brown (#6E1005). oklch(34.2% 0.106 40.9), rgb(99, 31, 0).
Aa
White text reads best on this color (12.16:1).
About this color
#631F00 is a dark, moderately saturated brown. In OKLCH its lightness is 34%, its chroma 0.106 and its hue 41°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.032 away. White text reads best on it, at 12.16:1.
| Hue family | Browns |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.106) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.72:1 |
| White text | 12.16:1 |
Values
| HEX | #631F00 |
| RGB | rgb(99, 31, 0) |
| HSL | hsl(19, 100%, 19%) |
| OKLCH | oklch(34.2% 0.106 40.9) |
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 #631F00 | 12.16:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #631F00 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #631F00 text on white | 12.16:1 | AAA | Lc 96.9 | Preferred for body text |
| #631F00 text on black | 1.72:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F8E5DE
oklch(93.5% 0.023 41.4)
-
Step 200
200
#F4D0C3
oklch(88.5% 0.044 40.9)
-
Step 300
300
#EEB09A
oklch(80.9% 0.079 40.4)
-
Step 400
400
#E28461
oklch(70.7% 0.126 41)
-
Step 500
500
#D76131
oklch(63.1% 0.161 41.1)
-
Step 600
600
#C14500
oklch(55.6% 0.171 41.1)
-
Step 700
700
#A33900
oklch(49.1% 0.151 41.1)
-
Step 800
800
#872D00
oklch(42.7% 0.132 40.7)
-
Step 900
900 (this color)
#631F00
oklch(34.2% 0.106 40.9)
-
Step 950
950
#411909
oklch(27.1% 0.067 41.1)
#631F00 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) | #332C00 | 0.104 |
| Deuteranopia (no green cones) | #443B00 | 0.092 |
| Tritanopia (no blue cones) | #6E0A1A | 0.049 |
| Achromatopsia (no color) | #363636 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631F00
#631F00
oklch(34.2% 0.106 40.9)
- #00404F
#00404F
oklch(34.4% 0.062 219.7)
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 #631F00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.032
- Chestnut #742802 ΔE 0.045
- Blood #770001 ΔE 0.051
- Claret #680018 ΔE 0.054
- Maroon #800000 ΔE 0.065
- Burgundy #610023 ΔE 0.071
- Wine Red #7B0323 ΔE 0.072
- Chocolate Brown #411900 ΔE 0.081
Use #631F00 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.