#C10903
Closest named color: Scarlet (#BE0119). oklch(51.2% 0.207 29.4), rgb(193, 9, 3).
Aa
White text reads best on this color (6.34:1).
About this color
#C10903 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.207 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.014 away. White text reads best on it, at 6.34:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.207) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.30:1 |
| White text | 6.34:1 |
Values
| HEX | #C10903 |
| RGB | rgb(193, 9, 3) |
| HSL | hsl(2, 97%, 38%) |
| OKLCH | oklch(51.2% 0.207 29.4) |
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 #C10903 | 6.34:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #C10903 | 3.30:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #C10903 text on white | 6.34:1 | AA | Lc 79.0 | Fine for body text |
| #C10903 text on black | 3.30:1 | AA large text | Lc -22.8 | 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
#FDE3DF
oklch(93.6% 0.029 28.1)
-
Step 200
200
#FCCCC4
oklch(88.5% 0.056 29.2)
-
Step 300
300
#FAA89B
oklch(80.8% 0.099 29.3)
-
Step 400
400
#F47463
oklch(70.7% 0.161 29.4)
-
Step 500
500
#EB4636
oklch(63% 0.204 29.5)
-
Step 600
600
#D71108
oklch(55.6% 0.222 29.4)
-
Step 700
700 (this color)
#C10903
oklch(51.2% 0.207 29.4)
-
Step 800
800
#970803
oklch(42.8% 0.171 29.5)
-
Step 900
900
#791710
oklch(37.7% 0.134 29.2)
-
Step 950
950
#47110B
oklch(27% 0.084 29.8)
#C10903 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) | #524700 | 0.225 |
| Deuteranopia (no green cones) | #7B6C00 | 0.199 |
| Tritanopia (no blue cones) | #D6000F | 0.043 |
| Achromatopsia (no color) | #5F5F5F | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C10903
#C10903
oklch(51.2% 0.207 29.4)
- #007482
#007482
oklch(51.2% 0.088 209.4)
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 #C10903, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.014
- Lipstick Red #C0022F ΔE 0.032
- Firebrick #B22222 ΔE 0.032
- Rufous #AE2012 ΔE 0.037
- Rusty Red #AF2F0D ΔE 0.042
- Cherry #CF0234 ΔE 0.045
- Rust Red #AA2704 ΔE 0.047
- Rose Red #BE013C ΔE 0.048
Use #C10903 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.