#C10B23
Closest named color: Scarlet (#BE0119). oklch(51.4% 0.204 24.5), rgb(193, 11, 35).
Aa
White text reads best on this color (6.28:1).
About this color
#C10B23 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.204 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.011 away. White text reads best on it, at 6.28:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.204) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.33:1 |
| White text | 6.28:1 |
Values
| HEX | #C10B23 |
| RGB | rgb(193, 11, 35) |
| HSL | hsl(352, 89%, 40%) |
| OKLCH | oklch(51.4% 0.204 24.5) |
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 #C10B23 | 6.28:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #C10B23 | 3.33:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #C10B23 text on white | 6.28:1 | AA | Lc 78.9 | Fine for body text |
| #C10B23 text on black | 3.33:1 | AA large text | Lc -22.9 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FDE3E0
oklch(93.6% 0.029 25.6)
-
Step 200
200
#FCCCC7
oklch(88.6% 0.055 25.2)
-
Step 300
300
#FAA8A1
oklch(81% 0.098 24.8)
-
Step 400
400
#F3746E
oklch(70.7% 0.157 24.6)
-
Step 500
500
#EA4547
oklch(63% 0.202 24.5)
-
Step 600
600
#D61029
oklch(55.6% 0.219 24.4)
-
Step 700
700 (this color)
#C10B23
oklch(51.4% 0.204 24.5)
-
Step 800
800
#960719
oklch(42.7% 0.169 24.5)
-
Step 900
900
#78171B
oklch(37.6% 0.131 24.4)
-
Step 950
950
#471010
oklch(27% 0.084 24.7)
#C10B23 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) | #514821 | 0.224 |
| Deuteranopia (no green cones) | #7A6D1A | 0.204 |
| Tritanopia (no blue cones) | #D50019 | 0.041 |
| Achromatopsia (no color) | #606060 | 0.205 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C10B23
#C10B23
oklch(51.4% 0.204 24.5)
- #00757F
#00757F
oklch(51.3% 0.088 205.2)
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 #C10B23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.011
- Lipstick Red #C0022F ΔE 0.014
- Firebrick #B22222 ΔE 0.031
- Rose Red #BE013C ΔE 0.031
- Cherry #CF0234 ΔE 0.033
- Rufous #AE2012 ΔE 0.042
- Ruby #CA0147 ΔE 0.046
- Rusty Red #AF2F0D ΔE 0.049
Use #C10B23 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.