#C81816
Closest named color: Scarlet (#BE0119). oklch(53.1% 0.206 28.4), rgb(200, 24, 22).
Aa
White text reads best on this color (5.83:1).
About this color
#C81816 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.206 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.028 away. White text reads best on it, at 5.83:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.206) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.59:1 |
| White text | 5.83:1 |
Values
| HEX | #C81816 |
| RGB | rgb(200, 24, 22) |
| HSL | hsl(1, 80%, 44%) |
| OKLCH | oklch(53.1% 0.206 28.4) |
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 #C81816 | 5.83:1 | AA | Lc -82.4 | Fine for body text |
| Black text on #C81816 | 3.59:1 | AA large text | Lc 27.0 | Dividers and decoration only |
| #C81816 text on white | 5.83:1 | AA | Lc 77.0 | Fine for body text |
| #C81816 text on black | 3.59:1 | AA large text | Lc -24.7 | 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
#FEF3F1
oklch(97.2% 0.012 29.9)
-
Step 100
100
#FBE4E0
oklch(93.6% 0.026 29.4)
-
Step 200
200
#FACDC6
oklch(88.5% 0.052 28.5)
-
Step 300
300
#F7AA9F
oklch(80.9% 0.093 28.3)
-
Step 400
400
#EF786A
oklch(70.7% 0.149 28.3)
-
Step 500
500
#E54E41
oklch(63% 0.189 28.5)
-
Step 600
600 (this color)
#C81816
oklch(53.1% 0.206 28.4)
-
Step 700
700
#B41312
oklch(49% 0.191 28.3)
-
Step 800
800
#921713
oklch(42.7% 0.158 28.3)
-
Step 900
900
#761D17
oklch(37.8% 0.124 28.4)
-
Step 950
950
#45130F
oklch(26.9% 0.078 28)
#C81816 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) | #574D11 | 0.226 |
| Deuteranopia (no green cones) | #817204 | 0.202 |
| Tritanopia (no blue cones) | #DD001C | 0.042 |
| Achromatopsia (no color) | #656565 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C81816
#C81816
oklch(53.1% 0.206 28.4)
- #007A88
#007A88
oklch(53% 0.091 208.8)
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 #C81816, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.028
- Cherry #CF0234 ΔE 0.033
- Lipstick Red #C0022F ΔE 0.034
- Firebrick #B22222 ΔE 0.044
- Rose Red #BE013C ΔE 0.050
- Dull Red #BB3F3F ΔE 0.050
- Sinopia #BB3E03 ΔE 0.051
- Rusty Red #AF2F0D ΔE 0.052
Use #C81816 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.