#A40A0A
Closest named color: Carmine (#9D0216). oklch(45.5% 0.181 28.6), rgb(164, 10, 10).
Aa
White text reads best on this color (7.99:1).
About this color
#A40A0A is a medium-dark, vivid red. In OKLCH its lightness is 46%, its chroma 0.181 and its hue 29°. 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 7.99:1.
| Hue family | Reds |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.181) |
| Temperature | warm |
| Nearest name | Carmine (#9D0216) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #A40A0A |
| RGB | rgb(164, 10, 10) |
| HSL | hsl(0, 89%, 34%) |
| OKLCH | oklch(45.5% 0.181 28.6) |
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 #A40A0A | 7.99:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #A40A0A | 2.62:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #A40A0A text on white | 7.99:1 | AAA | Lc 85.4 | Fine for body text |
| #A40A0A text on black | 2.62:1 | Fails | Lc -16.6 | 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FEE3DE
oklch(93.6% 0.031 30.2)
-
Step 200
200
#FECBC3
oklch(88.5% 0.059 28.6)
-
Step 300
300
#FEA69A
oklch(80.9% 0.106 28.1)
-
Step 400
400
#F87061
oklch(70.6% 0.17 28.5)
-
Step 500
500
#F03D32
oklch(63% 0.217 28.6)
-
Step 600
600
#D90008
oklch(55.6% 0.228 28.6)
-
Step 700
700
#B80006
oklch(49.2% 0.201 28.5)
-
Step 800
800 (this color)
#A40A0A
oklch(45.5% 0.181 28.6)
-
Step 900
900
#7C100D
oklch(37.8% 0.142 28.4)
-
Step 950
950
#490E0A
oklch(27% 0.089 28.5)
#A40A0A 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) | #453C05 | 0.198 |
| Deuteranopia (no green cones) | #685C00 | 0.178 |
| Tritanopia (no blue cones) | #B6000F | 0.038 |
| Achromatopsia (no color) | #515151 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A40A0A
#A40A0A
oklch(45.5% 0.181 28.6)
- #00626E
#00626E
oklch(45.4% 0.078 209.3)
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 #A40A0A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carmine #9D0216 ΔE 0.020
- Burnt Red #9F2305 ΔE 0.023
- Deep Red #9A0200 ΔE 0.024
- Auburn #9B2226 ΔE 0.027
- Blood Red #980002 ΔE 0.029
- Rufous #AE2012 ΔE 0.032
- Rust Red #AA2704 ΔE 0.035
- Brown #A52A2A ΔE 0.035
Use #A40A0A 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.