#A63F10
Closest named color: Burnt Umber (#A0450E). oklch(50.4% 0.146 40.9), rgb(166, 63, 16).
Aa
White text reads best on this color (6.28:1).
About this color
#A63F10 is a medium-dark, vivid orange. In OKLCH its lightness is 50%, its chroma 0.146 and its hue 41°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Umber (#A0450E), ΔE 0.016 away. White text reads best on it, at 6.28:1.
| Hue family | Oranges |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.146) |
| Temperature | warm |
| Nearest name | Burnt Umber (#A0450E) |
| Black text | 3.33:1 |
| White text | 6.28:1 |
Values
| HEX | #A63F10 |
| RGB | rgb(166, 63, 16) |
| HSL | hsl(19, 82%, 36%) |
| OKLCH | oklch(50.4% 0.146 40.9) |
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 #A63F10 | 6.28:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #A63F10 | 3.33:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #A63F10 text on white | 6.28:1 | AA | Lc 80.5 | Fine for body text |
| #A63F10 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
#FBF3F1
oklch(97% 0.009 34.3)
-
Step 100
100
#F7E6E0
oklch(93.7% 0.02 40.5)
-
Step 200
200
#F1D1C6
oklch(88.5% 0.039 39.9)
-
Step 300
300
#E9B29E
oklch(80.9% 0.07 40.9)
-
Step 400
400
#DC8768
oklch(70.6% 0.114 40.7)
-
Step 500
500
#D0673E
oklch(63.1% 0.144 41.2)
-
Step 600
600
#BC4B19
oklch(55.7% 0.157 41)
-
Step 700
700 (this color)
#A63F10
oklch(50.4% 0.146 40.9)
-
Step 800
800
#83320E
oklch(42.7% 0.121 41.1)
-
Step 900
900
#6A2D15
oklch(37.8% 0.094 40.8)
-
Step 950
950
#3E1B0D
oklch(27% 0.06 41.7)
#A63F10 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) | #5D5105 | 0.143 |
| Deuteranopia (no green cones) | #766909 | 0.131 |
| Tritanopia (no blue cones) | #B72337 | 0.069 |
| Achromatopsia (no color) | #606060 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A63F10
#A63F10
oklch(50.4% 0.146 40.9)
- #007089
#007089
oklch(50.4% 0.092 220.4)
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 #A63F10, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Umber #A0450E ΔE 0.016
- Russet #A13905 ΔE 0.017
- Rusty Red #AF2F0D ΔE 0.029
- Brick #A03623 ΔE 0.030
- Rust Red #AA2704 ΔE 0.038
- Cinnamon #AC4F06 ΔE 0.039
- Sienna #A0522D ΔE 0.039
- Sinopia #BB3E03 ΔE 0.041
Use #A63F10 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.