#CB0B01
Closest named color: Scarlet (#BE0119). oklch(53.2% 0.214 29.7), rgb(203, 11, 1).
Aa
White text reads best on this color (5.85:1).
About this color
#CB0B01 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.214 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.031 away. White text reads best on it, at 5.85:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.214) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #CB0B01 |
| RGB | rgb(203, 11, 1) |
| HSL | hsl(3, 99%, 40%) |
| OKLCH | oklch(53.2% 0.214 29.7) |
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 #CB0B01 | 5.85:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #CB0B01 | 3.58:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #CB0B01 text on white | 5.85:1 | AA | Lc 76.7 | Fine for body text |
| #CB0B01 text on black | 3.58:1 | AA large text | Lc -25.0 | 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
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FCE3DF
oklch(93.5% 0.028 28.5)
-
Step 200
200
#FBCDC5
oklch(88.6% 0.054 29.6)
-
Step 300
300
#F9A99C
oklch(80.9% 0.097 29.5)
-
Step 400
400
#F17765
oklch(70.7% 0.154 30)
-
Step 500
500
#E84A39
oklch(63% 0.197 29.7)
-
Step 600
600 (this color)
#CB0B01
oklch(53.2% 0.214 29.7)
-
Step 700
700
#B70700
oklch(49.1% 0.199 29.7)
-
Step 800
800
#951108
oklch(42.8% 0.165 29.7)
-
Step 900
900
#771A12
oklch(37.6% 0.129 29.4)
-
Step 950
950
#46120C
oklch(27% 0.081 29.8)
#CB0B01 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) | #574B00 | 0.233 |
| Deuteranopia (no green cones) | #827200 | 0.206 |
| Tritanopia (no blue cones) | #E10010 | 0.045 |
| Achromatopsia (no color) | #656565 | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB0B01
#CB0B01
oklch(53.2% 0.214 29.7)
- #007A89
#007A89
oklch(53.1% 0.092 209.7)
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 #CB0B01, closest first.
No curated palette has a color within ΔE 0.04 of #CB0B01.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.031
- Cherry #CF0234 ΔE 0.036
- Lipstick Red #C0022F ΔE 0.040
- Firebrick #B22222 ΔE 0.050
- Crimson #DC143C ΔE 0.054
- Sinopia #BB3E03 ΔE 0.055
- Rose Red #BE013C ΔE 0.056
- Rusty Red #AF2F0D ΔE 0.057
Use #CB0B01 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.