#A03F21
Closest named color: Russet (#A13905). oklch(49.6% 0.136 37.3), rgb(160, 63, 33).
Aa
White text reads best on this color (6.50:1).
About this color
#A03F21 is a medium-dark, moderately saturated red. In OKLCH its lightness is 50%, its chroma 0.136 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Russet (#A13905), ΔE 0.017 away. White text reads best on it, at 6.50:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.136) |
| Temperature | warm |
| Nearest name | Russet (#A13905) |
| Black text | 3.22:1 |
| White text | 6.50:1 |
Values
| HEX | #A03F21 |
| RGB | rgb(160, 63, 33) |
| HSL | hsl(14, 66%, 38%) |
| OKLCH | oklch(49.6% 0.136 37.3) |
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 #A03F21 | 6.50:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #A03F21 | 3.22:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #A03F21 text on white | 6.50:1 | AA | Lc 81.5 | Fine for body text |
| #A03F21 text on black | 3.22:1 | AA large text | Lc -20.4 | 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
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F6E6E1
oklch(93.6% 0.019 38.1)
-
Step 200
200
#F0D1C8
oklch(88.4% 0.037 36.8)
-
Step 300
300
#E7B2A3
oklch(80.8% 0.066 36.4)
-
Step 400
400
#D98971
oklch(70.7% 0.105 37.5)
-
Step 500
500
#CD694B
oklch(63.2% 0.134 37.5)
-
Step 600
600
#B84D2D
oklch(55.5% 0.146 37.1)
-
Step 700
700 (this color)
#A03F21
oklch(49.6% 0.136 37.3)
-
Step 800
800
#81341C
oklch(42.8% 0.113 37.6)
-
Step 900
900
#682E1D
oklch(37.7% 0.088 37.1)
-
Step 950
950
#3D1C12
oklch(27.1% 0.055 37.6)
#A03F21 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) | #5A501D | 0.136 |
| Deuteranopia (no green cones) | #72661E | 0.124 |
| Tritanopia (no blue cones) | #B02839 | 0.059 |
| Achromatopsia (no color) | #5E5E5E | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A03F21
#A03F21
oklch(49.6% 0.136 37.3)
- #006E83
#006E83
oklch(49.6% 0.089 217.1)
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 #A03F21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Russet #A13905 ΔE 0.017
- Brick #A03623 ΔE 0.019
- Burnt Umber #A0450E ΔE 0.021
- Rusty Red #AF2F0D ΔE 0.035
- Rust Red #AA2704 ΔE 0.039
- Sienna #A0522D ΔE 0.040
- Brown #A52A2A ΔE 0.041
- Saddle Brown #8B4513 ΔE 0.045
Use #A03F21 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.