#631C21
Closest named color: Claret (#680018). oklch(34.2% 0.102 20.4), rgb(99, 28, 33).
Aa
White text reads best on this color (12.21:1).
About this color
#631C21 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.102 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Claret (#680018), ΔE 0.033 away. White text reads best on it, at 12.21:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.102) |
| Temperature | warm |
| Nearest name | Claret (#680018) |
| Black text | 1.71:1 |
| White text | 12.21:1 |
Values
| HEX | #631C21 |
| RGB | rgb(99, 28, 33) |
| HSL | hsl(356, 56%, 25%) |
| OKLCH | oklch(34.2% 0.102 20.4) |
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 #631C21 | 12.21:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #631C21 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #631C21 text on white | 12.21:1 | AAA | Lc 97.0 | Preferred for body text |
| #631C21 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F4CFCD
oklch(88.5% 0.042 21.6)
-
Step 300
300
#EEADAC
oklch(80.8% 0.077 19.9)
-
Step 400
400
#E38080
oklch(70.8% 0.122 20.6)
-
Step 500
500
#D85B60
oklch(63.1% 0.157 20.4)
-
Step 600
600
#C33D47
oklch(55.7% 0.17 20.5)
-
Step 700
700
#A82D38
oklch(49.1% 0.159 20.6)
-
Step 800
800
#88272F
oklch(42.6% 0.131 20.2)
-
Step 900
900 (this color)
#631C21
oklch(34.2% 0.102 20.4)
-
Step 950
950
#411719
oklch(27% 0.066 19.7)
#631C21 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) | #2F2C21 | 0.110 |
| Deuteranopia (no green cones) | #413B1F | 0.102 |
| Tritanopia (no blue cones) | #6D0B1E | 0.027 |
| Achromatopsia (no color) | #353535 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631C21
#631C21
oklch(34.2% 0.102 20.4)
- #004145
#004145
oklch(34.2% 0.058 201.7)
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 #631C21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Claret #680018 ΔE 0.033
- Reddy Brown #6E1005 ΔE 0.035
- Burgundy #610023 ΔE 0.042
- Blood #770001 ΔE 0.050
- Wine Red #7B0323 ΔE 0.054
- Bordeaux #7B002C ΔE 0.059
- Chestnut #742802 ΔE 0.061
- Merlot #730039 ΔE 0.063
Use #631C21 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.