#7C2521
Closest named color: Chestnut (#742802). oklch(40% 0.121 26.7), rgb(124, 37, 33).
Aa
White text reads best on this color (9.79:1).
About this color
#7C2521 is a dark, moderately saturated red. In OKLCH its lightness is 40%, its chroma 0.121 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.034 away. White text reads best on it, at 9.79:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.121) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.14:1 |
| White text | 9.79:1 |
Values
| HEX | #7C2521 |
| RGB | rgb(124, 37, 33) |
| HSL | hsl(3, 58%, 31%) |
| OKLCH | oklch(40% 0.121 26.7) |
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 #7C2521 | 9.79:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #7C2521 | 2.14:1 | Fails | Lc 12.2 | Not readable |
| #7C2521 text on white | 9.79:1 | AAA | Lc 91.8 | Preferred for body text |
| #7C2521 text on black | 2.14:1 | Fails | Lc -10.6 | Not readable |
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 900.
-
Step 50
50
#FEF3F1
oklch(97.2% 0.012 29.9)
-
Step 100
100
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F9CDC7
oklch(88.5% 0.051 27.2)
-
Step 300
300
#F6AAA1
oklch(80.9% 0.091 26.8)
-
Step 400
400
#ED796E
oklch(70.6% 0.145 26.9)
-
Step 500
500
#E44F48
oklch(63.1% 0.186 26.6)
-
Step 600
600
#CF2829
oklch(55.5% 0.202 26.7)
-
Step 700
700
#B3171C
oklch(49.1% 0.188 26.7)
-
Step 800
800
#911919
oklch(42.7% 0.155 26.9)
-
Step 900
900 (this color)
#7C2521
oklch(40% 0.121 26.7)
-
Step 950
950
#451311
oklch(27% 0.077 26)
#7C2521 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) | #3D3820 | 0.130 |
| Deuteranopia (no green cones) | #534B1E | 0.120 |
| Tritanopia (no blue cones) | #890C25 | 0.038 |
| Achromatopsia (no color) | #444444 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #7C2521
#7C2521
oklch(40% 0.121 26.7)
- #00525A
#00525A
oklch(40.1% 0.069 206.2)
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 #7C2521, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.034
- Maroon #800000 ΔE 0.041
- Red Brown #8B2E16 ΔE 0.042
- Brick Red #8F1402 ΔE 0.043
- Dark Red #8B0000 ΔE 0.043
- Wine Red #7B0323 ΔE 0.044
- Blood #770001 ΔE 0.049
- Rust Brown #8B3103 ΔE 0.052
Use #7C2521 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.