#C21F0C
Closest named color: Scarlet (#BE0119). oklch(52.3% 0.198 30.6), rgb(194, 31, 12).
Aa
White text reads best on this color (6.00:1).
About this color
#C21F0C is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.198 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.025 away. White text reads best on it, at 6.00:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.198) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.49:1 |
| White text | 6.00:1 |
Values
| HEX | #C21F0C |
| RGB | rgb(194, 31, 12) |
| HSL | hsl(6, 88%, 40%) |
| OKLCH | oklch(52.3% 0.198 30.6) |
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 #C21F0C | 6.00:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #C21F0C | 3.49:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #C21F0C text on white | 6.00:1 | AA | Lc 78.1 | Fine for body text |
| #C21F0C text on black | 3.49:1 | AA large text | Lc -23.7 | 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 700.
-
Step 50
50
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FCE4DF
oklch(93.7% 0.027 31.7)
-
Step 200
200
#FACDC4
oklch(88.5% 0.053 31.3)
-
Step 300
300
#F8A99B
oklch(80.8% 0.096 30.4)
-
Step 400
400
#F17764
oklch(70.7% 0.154 30.5)
-
Step 500
500
#E84B37
oklch(63.1% 0.197 30.5)
-
Step 600
600
#D3200A
oklch(55.5% 0.213 30.6)
-
Step 700
700 (this color)
#C21F0C
oklch(52.3% 0.198 30.6)
-
Step 800
800
#941204
oklch(42.6% 0.164 30.6)
-
Step 900
900
#771B10
oklch(37.7% 0.128 30.6)
-
Step 950
950
#46120B
oklch(26.9% 0.081 30.7)
#C21F0C 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) | #574C04 | 0.215 |
| Deuteranopia (no green cones) | #7E6F00 | 0.191 |
| Tritanopia (no blue cones) | #D6001E | 0.042 |
| Achromatopsia (no color) | #636363 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C21F0C
#C21F0C
oklch(52.3% 0.198 30.6)
- #007787
#007787
oklch(52.2% 0.091 211)
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 #C21F0C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.025
- Firebrick #B22222 ΔE 0.035
- Lipstick Red #C0022F ΔE 0.038
- Rusty Red #AF2F0D ΔE 0.038
- Rufous #AE2012 ΔE 0.041
- Sinopia #BB3E03 ΔE 0.042
- Cherry #CF0234 ΔE 0.045
- Dull Red #BB3F3F ΔE 0.048
Use #C21F0C 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.