#CB2100
Closest named color: Scarlet (#BE0119). oklch(54.1% 0.206 31.8), rgb(203, 33, 0).
Aa
White text reads best on this color (5.58:1).
About this color
#CB2100 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.206 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.042 away. White text reads best on it, at 5.58:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.206) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.75:1 |
| White text | 5.58:1 |
Values
| HEX | #CB2100 |
| RGB | rgb(203, 33, 0) |
| HSL | hsl(10, 100%, 40%) |
| OKLCH | oklch(54.1% 0.206 31.8) |
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 #CB2100 | 5.58:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #CB2100 | 3.75:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #CB2100 text on white | 5.58:1 | AA | Lc 75.9 | Fine for body text |
| #CB2100 text on black | 3.75:1 | AA large text | Lc -25.8 | 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
#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
#F6AB9B
oklch(80.9% 0.092 32.5)
-
Step 400
400
#EE7A64
oklch(70.7% 0.148 32.1)
-
Step 500
500
#E55037
oklch(63.1% 0.189 32)
-
Step 600
600 (this color)
#CB2100
oklch(54.1% 0.206 31.8)
-
Step 700
700
#B21C00
oklch(49.1% 0.187 31.9)
-
Step 800
800
#921904
oklch(42.7% 0.158 31.9)
-
Step 900
900
#751E10
oklch(37.6% 0.123 31.9)
-
Step 950
950
#45140B
oklch(27% 0.078 32.5)
#CB2100 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) | #5C5000 | 0.220 |
| Deuteranopia (no green cones) | #847500 | 0.197 |
| Tritanopia (no blue cones) | #E0001F | 0.045 |
| Achromatopsia (no color) | #686868 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB2100
#CB2100
oklch(54.1% 0.206 31.8)
- #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 #CB2100, closest first.
No curated palette has a color within ΔE 0.04 of #CB2100.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.042
- Sinopia #BB3E03 ΔE 0.043
- Cherry #CF0234 ΔE 0.043
- Lipstick Red #C0022F ΔE 0.050
- Dull Red #BB3F3F ΔE 0.052
- Firebrick #B22222 ΔE 0.054
- Rusty Red #AF2F0D ΔE 0.055
- Crimson #DC143C ΔE 0.056
Use #CB2100 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.