#C01B28
Closest named color: Scarlet (#BE0119). oklch(51.9% 0.196 24.6), rgb(192, 27, 40).
Aa
White text reads best on this color (6.12:1).
About this color
#C01B28 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.196 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.017 away. White text reads best on it, at 6.12:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.196) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.42:1 |
| White text | 6.12:1 |
Values
| HEX | #C01B28 |
| RGB | rgb(192, 27, 40) |
| HSL | hsl(355, 75%, 43%) |
| OKLCH | oklch(51.9% 0.196 24.6) |
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 #C01B28 | 6.12:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #C01B28 | 3.42:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #C01B28 text on white | 6.12:1 | AA | Lc 78.6 | Fine for body text |
| #C01B28 text on black | 3.42:1 | AA large text | Lc -23.2 | 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 700.
-
Step 50
50
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E1
oklch(93.6% 0.028 23.2)
-
Step 200
200
#FACCC8
oklch(88.4% 0.053 24)
-
Step 300
300
#F8A9A2
oklch(80.9% 0.094 25)
-
Step 400
400
#F07670
oklch(70.6% 0.152 24.5)
-
Step 500
500
#E74A4A
oklch(63% 0.194 24.6)
-
Step 600
600
#D31E2C
oklch(55.7% 0.211 24.7)
-
Step 700
700 (this color)
#C01B28
oklch(51.9% 0.196 24.6)
-
Step 800
800
#94111C
oklch(42.8% 0.163 24.6)
-
Step 900
900
#771A1C
oklch(37.7% 0.127 24.8)
-
Step 950
950
#461211
oklch(27% 0.08 25.2)
#C01B28 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) | #534B26 | 0.216 |
| Deuteranopia (no green cones) | #7B6E20 | 0.196 |
| Tritanopia (no blue cones) | #D40023 | 0.039 |
| Achromatopsia (no color) | #626262 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C01B28
#C01B28
oklch(51.9% 0.196 24.6)
- #007781
#007781
oklch(51.9% 0.089 205.1)
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 #C01B28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.017
- Lipstick Red #C0022F ΔE 0.018
- Firebrick #B22222 ΔE 0.029
- Rose Red #BE013C ΔE 0.033
- Cherry #CF0234 ΔE 0.033
- Rufous #AE2012 ΔE 0.041
- Dull Red #BB3F3F ΔE 0.044
- Rusty Red #AF2F0D ΔE 0.045
Use #C01B28 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.