#AC452A
Closest named color: Burnt Umber (#A0450E). oklch(52.5% 0.141 35.7), rgb(172, 69, 42).
Aa
White text reads best on this color (5.77:1).
About this color
#AC452A is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.141 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Umber (#A0450E), ΔE 0.033 away. White text reads best on it, at 5.77:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.141) |
| Temperature | warm |
| Nearest name | Burnt Umber (#A0450E) |
| Black text | 3.63:1 |
| White text | 5.77:1 |
Values
| HEX | #AC452A |
| RGB | rgb(172, 69, 42) |
| HSL | hsl(12, 61%, 42%) |
| OKLCH | oklch(52.5% 0.141 35.7) |
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 #AC452A | 5.77:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #AC452A | 3.63:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #AC452A text on white | 5.77:1 | AA | Lc 78.1 | Fine for body text |
| #AC452A text on black | 3.63:1 | AA large text | Lc -23.7 | 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 600.
-
Step 50
50
#FBF4F2
oklch(97.2% 0.008 36.6)
-
Step 100
100
#F6E6E2
oklch(93.7% 0.018 34.3)
-
Step 200
200
#EFD2C9
oklch(88.6% 0.035 38)
-
Step 300
300
#E6B3A5
oklch(80.9% 0.063 35.9)
-
Step 400
400
#D88974
oklch(70.7% 0.102 35.6)
-
Step 500
500
#CB6950
oklch(63% 0.13 35.4)
-
Step 600
600 (this color)
#AC452A
oklch(52.5% 0.141 35.7)
-
Step 700
700
#9D3F26
oklch(49.1% 0.131 35.8)
-
Step 800
800
#7F3421
oklch(42.5% 0.109 35.3)
-
Step 900
900
#672F20
oklch(37.8% 0.085 36)
-
Step 950
950
#3C1C13
oklch(26.9% 0.053 36.6)
#AC452A 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) | #615727 | 0.143 |
| Deuteranopia (no green cones) | #7B6E27 | 0.130 |
| Tritanopia (no blue cones) | #BD2D3F | 0.059 |
| Achromatopsia (no color) | #666666 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC452A
#AC452A
oklch(52.5% 0.141 35.7)
- #00778C
#00778C
oklch(52.4% 0.093 215.7)
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 #AC452A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Umber #A0450E ΔE 0.033
- Sienna #A0522D ΔE 0.033
- Sinopia #BB3E03 ΔE 0.033
- Cinnamon #AC4F06 ΔE 0.036
- Rusty Red #AF2F0D ΔE 0.037
- Russet #A13905 ΔE 0.040
- Dull Red #BB3F3F ΔE 0.041
- Brick #A03623 ΔE 0.041
Use #AC452A 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.