#A90621
Closest named color: Rouge (#AB1239). oklch(46.6% 0.185 23.3), rgb(169, 6, 33).
Aa
White text reads best on this color (7.67:1).
About this color
#A90621 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.185 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.027 away. White text reads best on it, at 7.67:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.185) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.73:1 |
| White text | 7.67:1 |
Values
| HEX | #A90621 |
| RGB | rgb(169, 6, 33) |
| HSL | hsl(350, 93%, 34%) |
| OKLCH | oklch(46.6% 0.185 23.3) |
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 #A90621 | 7.67:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #A90621 | 2.73:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #A90621 text on white | 7.67:1 | AAA | Lc 84.3 | Fine for body text |
| #A90621 text on black | 2.73:1 | Fails | Lc -17.7 | 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
#FEF3F2
oklch(97.2% 0.012 23.7)
-
Step 100
100
#FBE4E2
oklch(93.7% 0.025 23.6)
-
Step 200
200
#F9CDCA
oklch(88.5% 0.05 22.7)
-
Step 300
300
#F5AAA5
oklch(80.9% 0.089 23.5)
-
Step 400
400
#EC7975
oklch(70.6% 0.143 23.4)
-
Step 500
500
#E35052
oklch(63.2% 0.183 23.2)
-
Step 600
600
#CE2936
oklch(55.5% 0.199 23.2)
-
Step 700
700 (this color)
#A90621
oklch(46.6% 0.185 23.3)
-
Step 800
800
#901923
oklch(42.6% 0.153 23)
-
Step 900
900
#741E21
oklch(37.7% 0.12 23.2)
-
Step 950
950
#441314
oklch(26.9% 0.076 22.6)
#A90621 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) | #453E20 | 0.205 |
| Deuteranopia (no green cones) | #6A5E1A | 0.185 |
| Tritanopia (no blue cones) | #BB0016 | 0.039 |
| Achromatopsia (no color) | #535353 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A90621
#A90621
oklch(46.6% 0.185 23.3)
- #00666D
#00666D
oklch(46.5% 0.079 203.1)
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 #A90621, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.027
- Carmine #9D0216 ΔE 0.028
- Brown #A52A2A ΔE 0.030
- Auburn #9B2226 ΔE 0.031
- Rufous #AE2012 ΔE 0.031
- Firebrick #B22222 ΔE 0.034
- Burnt Red #9F2305 ΔE 0.038
- Rust Red #AA2704 ΔE 0.040
Use #A90621 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.