#C4371A
Closest named color: Sinopia (#BB3E03). oklch(54.7% 0.182 33.2), rgb(196, 55, 26).
Aa
White text reads best on this color (5.37:1).
About this color
#C4371A is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.182 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.024 away. White text reads best on it, at 5.37:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.182) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.90:1 |
| White text | 5.37:1 |
Values
| HEX | #C4371A |
| RGB | rgb(196, 55, 26) |
| HSL | hsl(10, 77%, 44%) |
| OKLCH | oklch(54.7% 0.182 33.2) |
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 #C4371A | 5.37:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #C4371A | 3.90:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #C4371A text on white | 5.37:1 | AA | Lc 75.4 | Fine for body text |
| #C4371A text on black | 3.90:1 | AA large text | Lc -26.3 | 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
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F6CFC6
oklch(88.5% 0.046 33.2)
-
Step 300
300
#F1AE9F
oklch(81% 0.082 33)
-
Step 400
400
#E6806A
oklch(70.7% 0.131 33.2)
-
Step 500
500
#DC5B40
oklch(63.2% 0.168 33.5)
-
Step 600
600 (this color)
#C4371A
oklch(54.7% 0.182 33.2)
-
Step 700
700
#AC2B0F
oklch(49.2% 0.17 33.3)
-
Step 800
800
#8B2611
oklch(42.6% 0.14 33.3)
-
Step 900
900
#702516
oklch(37.6% 0.11 33.2)
-
Step 950
950
#42170E
oklch(27% 0.069 33.5)
#C4371A 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) | #625714 | 0.191 |
| Deuteranopia (no green cones) | #857610 | 0.173 |
| Tritanopia (no blue cones) | #D80032 | 0.060 |
| Achromatopsia (no color) | #6A6A6A | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C4371A
#C4371A
oklch(54.7% 0.182 33.2)
- #007F92
#007F92
oklch(54.8% 0.096 212.8)
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 #C4371A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.024
- Dull Red #BB3F3F ΔE 0.035
- Brick Orange #C14A09 ΔE 0.036
- Burnt Orange #C04E01 ΔE 0.044
- Rusty Red #AF2F0D ΔE 0.048
- Dusty Red #B9484E ΔE 0.053
- Scarlet #BE0119 ΔE 0.053
- Firebrick #B22222 ΔE 0.054
Use #C4371A 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.