#CB2F03
Closest named color: Sinopia (#BB3E03). oklch(55.1% 0.197 33.9), rgb(203, 47, 3).
Aa
White text reads best on this color (5.32:1).
About this color
#CB2F03 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.197 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.034 away. White text reads best on it, at 5.32:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.197) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.94:1 |
| White text | 5.32:1 |
Values
| HEX | #CB2F03 |
| RGB | rgb(203, 47, 3) |
| HSL | hsl(13, 97%, 40%) |
| OKLCH | oklch(55.1% 0.197 33.9) |
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 #CB2F03 | 5.32:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #CB2F03 | 3.94:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #CB2F03 text on white | 5.32:1 | AA | Lc 74.8 | Content text, not long reading |
| #CB2F03 text on black | 3.94:1 | AA large text | Lc -26.9 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FAE4DF
oklch(93.5% 0.025 32.9)
-
Step 200
200
#F8CEC4
oklch(88.5% 0.05 33.6)
-
Step 300
300
#F4AC9B
oklch(80.9% 0.089 33.8)
-
Step 400
400
#EB7C63
oklch(70.6% 0.142 33.8)
-
Step 500
500
#E15536
oklch(63.1% 0.181 34)
-
Step 600
600 (this color)
#CB2F03
oklch(55.1% 0.197 33.9)
-
Step 700
700
#AE2600
oklch(49% 0.177 33.9)
-
Step 800
800
#8F1F03
oklch(42.6% 0.151 33.8)
-
Step 900
900
#73210F
oklch(37.6% 0.118 33.8)
-
Step 950
950
#44150B
oklch(27% 0.075 33.7)
#CB2F03 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) | #615500 | 0.208 |
| Deuteranopia (no green cones) | #877800 | 0.187 |
| Tritanopia (no blue cones) | #E0002A | 0.054 |
| Achromatopsia (no color) | #6B6B6B | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB2F03
#CB2F03
oklch(55.1% 0.197 33.9)
- #008094
#008094
oklch(55.1% 0.097 213.6)
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 #CB2F03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.034
- Brick Orange #C14A09 ΔE 0.043
- Dull Red #BB3F3F ΔE 0.048
- Burnt Orange #C04E01 ΔE 0.051
- Cherry #CF0234 ΔE 0.053
- Scarlet #BE0119 ΔE 0.054
- Rusty Red #AF2F0D ΔE 0.057
- Crimson #DC143C ΔE 0.060
Use #CB2F03 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.