#A0400B
Closest named color: Burnt Umber (#A0450E). oklch(49.6% 0.14 43.4), rgb(160, 64, 11).
Aa
White text reads best on this color (6.49:1).
About this color
#A0400B is a medium-dark, vivid orange. In OKLCH its lightness is 50%, its chroma 0.140 and its hue 43°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Umber (#A0450E), ΔE 0.010 away. White text reads best on it, at 6.49:1.
| Hue family | Oranges |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.140) |
| Temperature | warm |
| Nearest name | Burnt Umber (#A0450E) |
| Black text | 3.23:1 |
| White text | 6.49:1 |
Values
| HEX | #A0400B |
| RGB | rgb(160, 64, 11) |
| HSL | hsl(21, 87%, 34%) |
| OKLCH | oklch(49.6% 0.14 43.4) |
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 #A0400B | 6.49:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #A0400B | 3.23:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #A0400B text on white | 6.49:1 | AA | Lc 81.4 | Fine for body text |
| #A0400B text on black | 3.23:1 | AA large text | Lc -20.5 | 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
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F6E6E0
oklch(93.6% 0.019 41.8)
-
Step 200
200
#F0D2C6
oklch(88.6% 0.038 43.1)
-
Step 300
300
#E7B39E
oklch(80.9% 0.068 43)
-
Step 400
400
#D98A68
oklch(70.7% 0.108 43.9)
-
Step 500
500
#CD6A3E
oklch(63.2% 0.138 43.5)
-
Step 600
600
#B84F19
oklch(55.6% 0.15 43.6)
-
Step 700
700 (this color)
#A0400B
oklch(49.6% 0.14 43.4)
-
Step 800
800
#81340D
oklch(42.7% 0.117 43.1)
-
Step 900
900
#682F15
oklch(37.8% 0.09 43.3)
-
Step 950
950
#3D1C0D
oklch(27% 0.057 44)
#A0400B 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) | #5C5000 | 0.134 |
| Deuteranopia (no green cones) | #736604 | 0.121 |
| Tritanopia (no blue cones) | #B02737 | 0.070 |
| Achromatopsia (no color) | #5E5E5E | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A0400B
#A0400B
oklch(49.6% 0.14 43.4)
- #006D88
#006D88
oklch(49.6% 0.092 222.7)
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 #A0400B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Umber #A0450E ΔE 0.010
- Russet #A13905 ΔE 0.013
- Brick #A03623 ΔE 0.030
- Warm Brown #964E02 ΔE 0.036
- Rusty Red #AF2F0D ΔE 0.038
- Sienna #A0522D ΔE 0.040
- Saddle Brown #8B4513 ΔE 0.041
- Rust Red #AA2704 ΔE 0.042
Use #A0400B 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.