#631D13
Closest named color: Reddy Brown (#6E1005). oklch(34.1% 0.103 31), rgb(99, 29, 19).
Aa
White text reads best on this color (12.24:1).
About this color
#631D13 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.103 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.027 away. White text reads best on it, at 12.24:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.103) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.71:1 |
| White text | 12.24:1 |
Values
| HEX | #631D13 |
| RGB | rgb(99, 29, 19) |
| HSL | hsl(8, 68%, 23%) |
| OKLCH | oklch(34.1% 0.103 31) |
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 #631D13 | 12.24:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #631D13 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #631D13 text on white | 12.24:1 | AAA | Lc 97.1 | Preferred for body text |
| #631D13 text on black | 1.71:1 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F9E5E1
oklch(93.7% 0.023 31.1)
-
Step 200
200
#F4CFC8
oklch(88.4% 0.043 30.5)
-
Step 300
300
#EEAFA2
oklch(80.9% 0.077 31.9)
-
Step 400
400
#E38170
oklch(70.6% 0.124 30.8)
-
Step 500
500
#D85E4A
oklch(63.1% 0.158 31.3)
-
Step 600
600
#C33F2C
oklch(55.5% 0.172 31.1)
-
Step 700
700
#A8301F
oklch(49.1% 0.159 31.2)
-
Step 800
800
#89291C
oklch(42.7% 0.133 30.8)
-
Step 900
900 (this color)
#631D13
oklch(34.1% 0.103 31)
-
Step 950
950
#411811
oklch(27% 0.066 31.5)
#631D13 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) | #312B11 | 0.108 |
| Deuteranopia (no green cones) | #423B10 | 0.100 |
| Tritanopia (no blue cones) | #6E091B | 0.036 |
| Achromatopsia (no color) | #353535 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631D13
#631D13
oklch(34.1% 0.103 31)
- #00404A
#00404A
oklch(34.1% 0.059 212)
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 #631D13, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.027
- Claret #680018 ΔE 0.040
- Blood #770001 ΔE 0.047
- Chestnut #742802 ΔE 0.051
- Burgundy #610023 ΔE 0.055
- Wine Red #7B0323 ΔE 0.061
- Maroon #800000 ΔE 0.063
- Bordeaux #7B002C ΔE 0.070
Use #631D13 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.