#A33F04
Closest named color: Burnt Umber (#A0450E). oklch(49.9% 0.145 43.2), rgb(163, 63, 4).
Aa
White text reads best on this color (6.42:1).
About this color
#A33F04 is a medium-dark, vivid orange. In OKLCH its lightness is 50%, its chroma 0.145 and its hue 43°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Umber (#A0450E), ΔE 0.012 away. White text reads best on it, at 6.42:1.
| Hue family | Oranges |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.145) |
| Temperature | warm |
| Nearest name | Burnt Umber (#A0450E) |
| Black text | 3.27:1 |
| White text | 6.42:1 |
Values
| HEX | #A33F04 |
| RGB | rgb(163, 63, 4) |
| HSL | hsl(22, 95%, 33%) |
| OKLCH | oklch(49.9% 0.145 43.2) |
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 #A33F04 | 6.42:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #A33F04 | 3.27:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #A33F04 text on white | 6.42:1 | AA | Lc 81.0 | Fine for body text |
| #A33F04 text on black | 3.27:1 | AA large text | Lc -20.8 | 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
#FBF4F0
oklch(97.1% 0.009 52.1)
-
Step 100
100
#F6E6DF
oklch(93.6% 0.02 45.3)
-
Step 200
200
#F1D2C5
oklch(88.6% 0.039 44.1)
-
Step 300
300
#E8B39D
oklch(80.9% 0.069 43.6)
-
Step 400
400
#DB8966
oklch(70.8% 0.112 43.7)
-
Step 500
500
#CF683A
oklch(63.1% 0.144 43.3)
-
Step 600
600
#BA4C11
oklch(55.5% 0.156 43.2)
-
Step 700
700 (this color)
#A33F04
oklch(49.9% 0.145 43.2)
-
Step 800
800
#823308
oklch(42.7% 0.12 43.4)
-
Step 900
900
#692E12
oklch(37.8% 0.093 43.6)
-
Step 950
950
#3E1B0C
oklch(27% 0.06 42.8)
#A33F04 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 | 0.139 |
| Deuteranopia (no green cones) | #756700 | 0.125 |
| Tritanopia (no blue cones) | #B42436 | 0.072 |
| Achromatopsia (no color) | #5F5F5F | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A33F04
#A33F04
oklch(49.9% 0.145 43.2)
- #006E8A
#006E8A
oklch(50% 0.093 223.4)
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 #A33F04, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Umber #A0450E ΔE 0.012
- Russet #A13905 ΔE 0.013
- Brick #A03623 ΔE 0.031
- Rusty Red #AF2F0D ΔE 0.034
- Warm Brown #964E02 ΔE 0.039
- Rust Red #AA2704 ΔE 0.040
- Sienna #A0522D ΔE 0.041
- Cinnamon #AC4F06 ΔE 0.041
Use #A33F04 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.