#AC3E33
Closest named color: Rusty Red (#AF2F0D). oklch(51.6% 0.146 28.8), rgb(172, 62, 51).
Aa
White text reads best on this color (6.01:1).
About this color
#AC3E33 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.146 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.032 away. White text reads best on it, at 6.01:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.146) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.49:1 |
| White text | 6.01:1 |
Values
| HEX | #AC3E33 |
| RGB | rgb(172, 62, 51) |
| HSL | hsl(5, 54%, 44%) |
| OKLCH | oklch(51.6% 0.146 28.8) |
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 #AC3E33 | 6.01:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #AC3E33 | 3.49:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #AC3E33 text on white | 6.01:1 | AA | Lc 79.2 | Fine for body text |
| #AC3E33 text on black | 3.49:1 | AA large text | Lc -22.6 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F2D0CA
oklch(88.5% 0.039 29.7)
-
Step 300
300
#EBB0A7
oklch(80.9% 0.071 28.6)
-
Step 400
400
#DE8477
oklch(70.6% 0.113 29)
-
Step 500
500
#D36255
oklch(63.1% 0.145 28.5)
-
Step 600
600
#BE4539
oklch(55.6% 0.158 28.8)
-
Step 700
700 (this color)
#AC3E33
oklch(51.6% 0.146 28.8)
-
Step 800
800
#852E25
oklch(42.8% 0.121 29)
-
Step 900
900
#6B2A23
oklch(37.7% 0.095 28.5)
-
Step 950
950
#3F1915
oklch(26.9% 0.06 27.9)
#AC3E33 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) | #5C5431 | 0.154 |
| Deuteranopia (no green cones) | #776C30 | 0.142 |
| Tritanopia (no blue cones) | #BD243C | 0.049 |
| Achromatopsia (no color) | #636363 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC3E33
#AC3E33
oklch(51.6% 0.146 28.8)
- #007683
#007683
oklch(51.8% 0.089 208.2)
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 #AC3E33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.032
- Dull Red #BB3F3F ΔE 0.033
- Brick #A03623 ΔE 0.034
- Firebrick #B22222 ΔE 0.039
- Brown #A52A2A ΔE 0.039
- Russet #A13905 ΔE 0.042
- Sinopia #BB3E03 ΔE 0.043
- Rust Red #AA2704 ΔE 0.043
Use #AC3E33 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.