#631104
Closest named color: Reddy Brown (#6E1005). oklch(32.6% 0.117 32.1), rgb(99, 17, 4).
Aa
White text reads best on this color (13.02:1).
About this color
#631104 is a dark, moderately saturated red. In OKLCH its lightness is 33%, its chroma 0.117 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.025 away. White text reads best on it, at 13.02:1.
| Hue family | Reds |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.117) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.61:1 |
| White text | 13.02:1 |
Values
| HEX | #631104 |
| RGB | rgb(99, 17, 4) |
| HSL | hsl(8, 92%, 20%) |
| OKLCH | oklch(32.6% 0.117 32.1) |
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 #631104 | 13.02:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #631104 | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #631104 text on white | 13.02:1 | AAA | Lc 98.0 | Preferred for body text |
| #631104 text on black | 1.61:1 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4DF
oklch(93.5% 0.025 32.9)
-
Step 200
200
#F8CEC5
oklch(88.5% 0.049 32.1)
-
Step 300
300
#F4AC9D
oklch(80.9% 0.088 32.1)
-
Step 400
400
#EB7C67
oklch(70.7% 0.141 32)
-
Step 500
500
#E1553C
oklch(63.1% 0.18 32.3)
-
Step 600
600
#CC3217
oklch(55.6% 0.194 32.2)
-
Step 700
700
#B02106
oklch(49% 0.181 32.1)
-
Step 800
800
#8F1F0C
oklch(42.7% 0.15 32)
-
Step 900
900 (this color)
#631104
oklch(32.6% 0.117 32.1)
-
Step 950
950
#44150D
oklch(27% 0.075 31.9)
#631104 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) | #2B2502 | 0.125 |
| Deuteranopia (no green cones) | #3F3700 | 0.112 |
| Tritanopia (no blue cones) | #6E000F | 0.030 |
| Achromatopsia (no color) | #313131 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631104
#631104
oklch(32.6% 0.117 32.1)
- #003C45
#003C45
oklch(32.7% 0.057 211.2)
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 #631104, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.025
- Claret #680018 ΔE 0.032
- Blood #770001 ΔE 0.044
- Burgundy #610023 ΔE 0.049
- Chestnut #742802 ΔE 0.063
- Maroon #800000 ΔE 0.063
- Wine Red #7B0323 ΔE 0.064
- Mahogany #4A0100 ΔE 0.070
Use #631104 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.