#A10028
Closest named color: Carmine (#9D0216). oklch(44.9% 0.18 19.7), rgb(161, 0, 40).
Aa
White text reads best on this color (8.24:1).
About this color
#A10028 is a dark, vivid red. In OKLCH its lightness is 45%, its chroma 0.180 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Carmine (#9D0216), ΔE 0.020 away. White text reads best on it, at 8.24:1.
| Hue family | Reds |
| Lightness | dark (45%) |
| Chroma | vivid (0.180) |
| Temperature | warm |
| Nearest name | Carmine (#9D0216) |
| Black text | 2.54:1 |
| White text | 8.24:1 |
Values
| HEX | #A10028 |
| RGB | rgb(161, 0, 40) |
| HSL | hsl(345, 100%, 32%) |
| OKLCH | oklch(44.9% 0.18 19.7) |
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 #A10028 | 8.24:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #A10028 | 2.54:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #A10028 text on white | 8.24:1 | AAA | Lc 86.0 | Fine for body text |
| #A10028 text on black | 2.54:1 | Fails | Lc -16.1 | 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 800.
-
Step 50
50
#FFF2F2
oklch(97.1% 0.014 17.4)
-
Step 100
100
#FEE2E2
oklch(93.6% 0.031 17.7)
-
Step 200
200
#FECAC9
oklch(88.4% 0.059 19.6)
-
Step 300
300
#FDA5A5
oklch(80.9% 0.105 19.6)
-
Step 400
400
#F76E75
oklch(70.6% 0.168 19.3)
-
Step 500
500
#EF3A51
oklch(63% 0.215 19.5)
-
Step 600
600
#D70039
oklch(55.6% 0.223 19.6)
-
Step 700
700
#B6002E
oklch(49.1% 0.197 19.8)
-
Step 800
800 (this color)
#A10028
oklch(44.9% 0.18 19.7)
-
Step 900
900
#7B0E21
oklch(37.7% 0.14 19.4)
-
Step 950
950
#490D14
oklch(27.1% 0.089 19.4)
#A10028 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) | #3F3A28 | 0.201 |
| Deuteranopia (no green cones) | #635922 | 0.182 |
| Tritanopia (no blue cones) | #B20016 | 0.041 |
| Achromatopsia (no color) | #4F4F4F | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A10028
#A10028
oklch(44.9% 0.18 19.7)
- #006165
#006165
oklch(44.8% 0.076 199.7)
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 #A10028, closest first.
No curated palette has a color within ΔE 0.04 of #A10028.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carmine #9D0216 ΔE 0.020
- Cranberry #9E003A ΔE 0.026
- Auburn #9B2226 ΔE 0.028
- Rouge #AB1239 ΔE 0.032
- Deep Red #9A0200 ΔE 0.035
- Blood Red #980002 ΔE 0.036
- Brown #A52A2A ΔE 0.042
- Burnt Red #9F2305 ΔE 0.046
Use #A10028 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.