#A63F08
Closest named color: Burnt Umber (#A0450E). oklch(50.4% 0.148 42.1), rgb(166, 63, 8).
Aa
White text reads best on this color (6.29:1).
About this color
#A63F08 is a medium-dark, vivid orange. In OKLCH its lightness is 50%, its chroma 0.148 and its hue 42°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Umber (#A0450E), ΔE 0.015 away. White text reads best on it, at 6.29:1.
| Hue family | Oranges |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.148) |
| Temperature | warm |
| Nearest name | Burnt Umber (#A0450E) |
| Black text | 3.33:1 |
| White text | 6.29:1 |
Values
| HEX | #A63F08 |
| RGB | rgb(166, 63, 8) |
| HSL | hsl(21, 91%, 34%) |
| OKLCH | oklch(50.4% 0.148 42.1) |
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 #A63F08 | 6.29:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #A63F08 | 3.33:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #A63F08 text on white | 6.29:1 | AA | Lc 80.5 | Fine for body text |
| #A63F08 text on black | 3.33:1 | AA large text | Lc -21.4 | 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
#FBF3F0
oklch(97% 0.01 41.9)
-
Step 100
100
#F7E6DF
oklch(93.7% 0.021 43.9)
-
Step 200
200
#F1D1C5
oklch(88.4% 0.04 41.7)
-
Step 300
300
#E9B29D
oklch(80.9% 0.071 41.9)
-
Step 400
400
#DC8866
oklch(70.7% 0.114 42.6)
-
Step 500
500
#D0673B
oklch(63.1% 0.145 42.2)
-
Step 600
600
#BC4B12
oklch(55.6% 0.159 42.3)
-
Step 700
700 (this color)
#A63F08
oklch(50.4% 0.148 42.1)
-
Step 800
800
#833209
oklch(42.7% 0.122 42.3)
-
Step 900
900
#6A2D12
oklch(37.8% 0.095 42.4)
-
Step 950
950
#3E1B0C
oklch(27% 0.06 42.8)
#A63F08 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) | #5D5100 | 0.143 |
| Deuteranopia (no green cones) | #766900 | 0.131 |
| Tritanopia (no blue cones) | #B72336 | 0.071 |
| Achromatopsia (no color) | #606060 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A63F08
#A63F08
oklch(50.4% 0.148 42.1)
- #00708A
#00708A
oklch(50.5% 0.093 221.3)
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 #A63F08, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Umber #A0450E ΔE 0.015
- Russet #A13905 ΔE 0.017
- Rusty Red #AF2F0D ΔE 0.031
- Brick #A03623 ΔE 0.032
- Cinnamon #AC4F06 ΔE 0.038
- Rust Red #AA2704 ΔE 0.039
- Sienna #A0522D ΔE 0.040
- Sinopia #BB3E03 ΔE 0.042
Use #A63F08 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.