#AC303B
Closest named color: Brown (#A52A2A). oklch(50.2% 0.16 20.4), rgb(172, 48, 59).
Aa
White text reads best on this color (6.48:1).
About this color
#AC303B is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.160 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.026 away. White text reads best on it, at 6.48:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.160) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.24:1 |
| White text | 6.48:1 |
Values
| HEX | #AC303B |
| RGB | rgb(172, 48, 59) |
| HSL | hsl(355, 56%, 43%) |
| OKLCH | oklch(50.2% 0.16 20.4) |
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 #AC303B | 6.48:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #AC303B | 3.24:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #AC303B text on white | 6.48:1 | AA | Lc 81.0 | Fine for body text |
| #AC303B text on black | 3.24:1 | AA large text | Lc -20.9 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F5CFCD
oklch(88.6% 0.043 21.6)
-
Step 300
300
#EFADAC
oklch(80.9% 0.078 19.9)
-
Step 400
400
#E37F80
oklch(70.6% 0.124 20)
-
Step 500
500
#D85B60
oklch(63.1% 0.157 20.4)
-
Step 600
600
#C33C47
oklch(55.6% 0.171 20.2)
-
Step 700
700 (this color)
#AC303B
oklch(50.2% 0.16 20.4)
-
Step 800
800
#89272F
oklch(42.8% 0.132 20.3)
-
Step 900
900
#6E262A
oklch(37.8% 0.102 20.2)
-
Step 950
950
#411719
oklch(27% 0.066 19.7)
#AC303B 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) | #524D3A | 0.175 |
| Deuteranopia (no green cones) | #726837 | 0.161 |
| Tritanopia (no blue cones) | #BD0535 | 0.042 |
| Achromatopsia (no color) | #5E5E5E | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC303B
#AC303B
oklch(50.2% 0.16 20.4)
- #007277
#007277
oklch(50.2% 0.085 200.1)
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 #AC303B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.026
- Firebrick #B22222 ΔE 0.028
- Rouge #AB1239 ΔE 0.036
- Rufous #AE2012 ΔE 0.038
- Brick #A03623 ΔE 0.040
- Rusty Red #AF2F0D ΔE 0.042
- Dull Red #BB3F3F ΔE 0.044
- Rust Red #AA2704 ΔE 0.045
Use #AC303B 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.