#CB1F00
Closest named color: Scarlet (#BE0119). oklch(54% 0.207 31.6), rgb(203, 31, 0).
Aa
White text reads best on this color (5.62:1).
About this color
#CB1F00 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.207 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.040 away. White text reads best on it, at 5.62:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.207) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #CB1F00 |
| RGB | rgb(203, 31, 0) |
| HSL | hsl(9, 100%, 40%) |
| OKLCH | oklch(54% 0.207 31.6) |
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 #CB1F00 | 5.62:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #CB1F00 | 3.73:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #CB1F00 text on white | 5.62:1 | AA | Lc 76.0 | Fine for body text |
| #CB1F00 text on black | 3.73:1 | AA large text | Lc -25.7 | 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 600.
-
Step 50
50
#FEF3F0
oklch(97.2% 0.013 35.7)
-
Step 100
100
#FBE4DF
oklch(93.6% 0.026 32.2)
-
Step 200
200
#F9CDC4
oklch(88.4% 0.052 31.6)
-
Step 300
300
#F7AA9B
oklch(80.8% 0.094 31.4)
-
Step 400
400
#EF7964
oklch(70.7% 0.15 31.5)
-
Step 500
500
#E54F38
oklch(63% 0.19 31.4)
-
Step 600
600 (this color)
#CB1F00
oklch(54% 0.207 31.6)
-
Step 700
700
#B31A00
oklch(49.1% 0.188 31.6)
-
Step 800
800
#921805
oklch(42.6% 0.159 31.5)
-
Step 900
900
#761E10
oklch(37.8% 0.124 31.8)
-
Step 950
950
#45130B
oklch(26.9% 0.079 31.6)
#CB1F00 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) | #5B4F00 | 0.223 |
| Deuteranopia (no green cones) | #847500 | 0.198 |
| Tritanopia (no blue cones) | #E0001D | 0.045 |
| Achromatopsia (no color) | #676767 | 0.209 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB1F00
#CB1F00
oklch(54% 0.207 31.6)
- #007D8E
#007D8E
oklch(54.1% 0.094 211.3)
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 #CB1F00, closest first.
No curated palette has a color within ΔE 0.04 of #CB1F00.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.040
- Cherry #CF0234 ΔE 0.042
- Sinopia #BB3E03 ΔE 0.044
- Lipstick Red #C0022F ΔE 0.049
- Dull Red #BB3F3F ΔE 0.053
- Firebrick #B22222 ΔE 0.053
- Rusty Red #AF2F0D ΔE 0.055
- Crimson #DC143C ΔE 0.055
Use #CB1F00 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.