#AB421D
Closest named color: Burnt Umber (#A0450E). oklch(51.8% 0.146 38.6), rgb(171, 66, 29).
Aa
White text reads best on this color (5.95:1).
About this color
#AB421D is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.146 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Umber (#A0450E), ΔE 0.025 away. White text reads best on it, at 5.95:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.146) |
| Temperature | warm |
| Nearest name | Burnt Umber (#A0450E) |
| Black text | 3.52:1 |
| White text | 5.95:1 |
Values
| HEX | #AB421D |
| RGB | rgb(171, 66, 29) |
| HSL | hsl(16, 71%, 39%) |
| OKLCH | oklch(51.8% 0.146 38.6) |
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 #AB421D | 5.95:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #AB421D | 3.52:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #AB421D text on white | 5.95:1 | AA | Lc 78.9 | Fine for body text |
| #AB421D text on black | 3.52:1 | AA large text | Lc -22.9 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F7E6E0
oklch(93.7% 0.02 40.5)
-
Step 200
200
#F1D1C7
oklch(88.5% 0.039 38.1)
-
Step 300
300
#EAB29F
oklch(81% 0.071 39.6)
-
Step 400
400
#DD876B
oklch(70.8% 0.113 38.8)
-
Step 500
500
#D16643
oklch(63.2% 0.144 38.6)
-
Step 600
600
#BC4921
oklch(55.5% 0.157 38.4)
-
Step 700
700 (this color)
#AB421D
oklch(51.8% 0.146 38.6)
-
Step 800
800
#843113
oklch(42.8% 0.121 38.8)
-
Step 900
900
#6A2C18
oklch(37.7% 0.094 38.2)
-
Step 950
950
#3E1B0F
oklch(27% 0.059 39.4)
#AB421D 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) | #605517 | 0.145 |
| Deuteranopia (no green cones) | #7A6C19 | 0.131 |
| Tritanopia (no blue cones) | #BC273B | 0.065 |
| Achromatopsia (no color) | #646464 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AB421D
#AB421D
oklch(51.8% 0.146 38.6)
- #00748C
#00748C
oklch(51.6% 0.093 218.9)
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 #AB421D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Umber #A0450E ΔE 0.025
- Russet #A13905 ΔE 0.030
- Rusty Red #AF2F0D ΔE 0.031
- Sinopia #BB3E03 ΔE 0.031
- Cinnamon #AC4F06 ΔE 0.033
- Sienna #A0522D ΔE 0.035
- Brick #A03623 ΔE 0.037
- Rust Red #AA2704 ΔE 0.044
Use #AB421D 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.