#CB331B
Closest named color: Sinopia (#BB3E03). oklch(55.5% 0.192 31.8), rgb(203, 51, 27).
Aa
White text reads best on this color (5.21:1).
About this color
#CB331B is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.192 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.036 away. White text reads best on it, at 5.21:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.192) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 4.02:1 |
| White text | 5.21:1 |
Values
| HEX | #CB331B |
| RGB | rgb(203, 51, 27) |
| HSL | hsl(8, 77%, 45%) |
| OKLCH | oklch(55.5% 0.192 31.8) |
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 #CB331B | 5.21:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #CB331B | 4.02:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #CB331B text on white | 5.21:1 | AA | Lc 74.4 | Content text, not long reading |
| #CB331B text on black | 4.02:1 | AA large text | Lc -27.3 | Dividers and decoration only |
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 600.
-
Step 50
50
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F7CEC6
oklch(88.4% 0.048 30.9)
-
Step 300
300
#F3AC9E
oklch(80.8% 0.087 31.5)
-
Step 400
400
#EA7D69
oklch(70.8% 0.139 31.6)
-
Step 500
500
#E0563F
oklch(63.2% 0.177 31.8)
-
Step 600
600 (this color)
#CB331B
oklch(55.5% 0.192 31.8)
-
Step 700
700
#AF230C
oklch(49% 0.179 31.7)
-
Step 800
800
#8E210F
oklch(42.7% 0.147 32)
-
Step 900
900
#722215
oklch(37.6% 0.115 31.8)
-
Step 950
950
#43160E
oklch(27% 0.072 32.1)
#CB331B 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) | #635715 | 0.203 |
| Deuteranopia (no green cones) | #887910 | 0.185 |
| Tritanopia (no blue cones) | #E00030 | 0.054 |
| Achromatopsia (no color) | #6C6C6C | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB331B
#CB331B
oklch(55.5% 0.192 31.8)
- #008294
#008294
oklch(55.7% 0.097 211.6)
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 #CB331B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.036
- Dull Red #BB3F3F ΔE 0.041
- Brick Orange #C14A09 ΔE 0.042
- Cherry #CF0234 ΔE 0.049
- Burnt Orange #C04E01 ΔE 0.051
- Crimson #DC143C ΔE 0.054
- Faded Red #D3494E ΔE 0.056
- Scarlet #BE0119 ΔE 0.056
Use #CB331B 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.