#CA0B10
Closest named color: Scarlet (#BE0119). oklch(53% 0.213 28.2), rgb(202, 11, 16).
Aa
White text reads best on this color (5.88:1).
About this color
#CA0B10 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.213 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 5.88:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.213) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.56:1 |
| White text | 5.88:1 |
Values
| HEX | #CA0B10 |
| RGB | rgb(202, 11, 16) |
| HSL | hsl(358, 90%, 42%) |
| OKLCH | oklch(53% 0.213 28.2) |
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 #CA0B10 | 5.88:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #CA0B10 | 3.56:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #CA0B10 text on white | 5.88:1 | AA | Lc 76.9 | Fine for body text |
| #CA0B10 text on black | 3.56:1 | AA large text | Lc -24.8 | 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 600.
-
Step 50
50
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E0
oklch(93.5% 0.028 25.9)
-
Step 200
200
#FBCDC6
oklch(88.6% 0.053 28.3)
-
Step 300
300
#F8A99E
oklch(80.8% 0.095 28.1)
-
Step 400
400
#F17769
oklch(70.8% 0.153 28.2)
-
Step 500
500
#E84B3F
oklch(63.2% 0.195 28.3)
-
Step 600
600 (this color)
#CA0B10
oklch(53% 0.213 28.2)
-
Step 700
700
#B7070C
oklch(49.2% 0.198 28.3)
-
Step 800
800
#94110F
oklch(42.7% 0.164 28.3)
-
Step 900
900
#771B15
oklch(37.7% 0.127 28.5)
-
Step 950
950
#46120E
oklch(27% 0.081 28.1)
#CA0B10 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) | #564B0A | 0.233 |
| Deuteranopia (no green cones) | #817200 | 0.209 |
| Tritanopia (no blue cones) | #DF0013 | 0.043 |
| Achromatopsia (no color) | #646464 | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CA0B10
#CA0B10
oklch(53% 0.213 28.2)
- #007A87
#007A87
oklch(53% 0.091 207.8)
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 #CA0B10, closest first.
No curated palette has a color within ΔE 0.04 of #CA0B10.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.028
- Cherry #CF0234 ΔE 0.031
- Lipstick Red #C0022F ΔE 0.035
- Firebrick #B22222 ΔE 0.047
- Rose Red #BE013C ΔE 0.050
- Crimson #DC143C ΔE 0.052
- Ruby #CA0147 ΔE 0.055
- Rufous #AE2012 ΔE 0.056
Use #CA0B10 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.