#CB2B18
Closest named color: Sinopia (#BB3E03). oklch(54.9% 0.198 30.7), rgb(203, 43, 24).
Aa
White text reads best on this color (5.38:1).
About this color
#CB2B18 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.198 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.040 away. White text reads best on it, at 5.38:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.198) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.89:1 |
| White text | 5.38:1 |
Values
| HEX | #CB2B18 |
| RGB | rgb(203, 43, 24) |
| HSL | hsl(6, 79%, 45%) |
| OKLCH | oklch(54.9% 0.198 30.7) |
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 #CB2B18 | 5.38:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #CB2B18 | 3.89:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #CB2B18 text on white | 5.38:1 | AA | Lc 75.2 | Fine for body text |
| #CB2B18 text on black | 3.89:1 | AA large text | Lc -26.6 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FBE4E0
oklch(93.6% 0.026 29.4)
-
Step 200
200
#F8CEC6
oklch(88.5% 0.049 30.7)
-
Step 300
300
#F5AB9E
oklch(80.9% 0.09 30.2)
-
Step 400
400
#EC7B69
oklch(70.7% 0.143 30.4)
-
Step 500
500
#E2533F
oklch(63.1% 0.182 30.7)
-
Step 600
600 (this color)
#CB2B18
oklch(54.9% 0.198 30.7)
-
Step 700
700
#B11D0C
oklch(49% 0.184 30.6)
-
Step 800
800
#901D0F
oklch(42.7% 0.152 30.8)
-
Step 900
900
#742015
oklch(37.7% 0.119 30.7)
-
Step 950
950
#44150E
oklch(27% 0.074 30.9)
#CB2B18 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) | #5F5412 | 0.212 |
| Deuteranopia (no green cones) | #867709 | 0.192 |
| Tritanopia (no blue cones) | #E00029 | 0.047 |
| Achromatopsia (no color) | #6A6A6A | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB2B18
#CB2B18
oklch(54.9% 0.198 30.7)
- #008090
#008090
oklch(55% 0.095 210)
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 #CB2B18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.040
- Cherry #CF0234 ΔE 0.042
- Dull Red #BB3F3F ΔE 0.044
- Scarlet #BE0119 ΔE 0.047
- Brick Orange #C14A09 ΔE 0.051
- Crimson #DC143C ΔE 0.051
- Lipstick Red #C0022F ΔE 0.052
- Firebrick #B22222 ΔE 0.056
Use #CB2B18 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.