#AC3337
Closest named color: Brown (#A52A2A). oklch(50.4% 0.157 23.1), rgb(172, 51, 55).
Aa
White text reads best on this color (6.39:1).
About this color
#AC3337 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.157 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.025 away. White text reads best on it, at 6.39:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.157) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.28:1 |
| White text | 6.39:1 |
Values
| HEX | #AC3337 |
| RGB | rgb(172, 51, 55) |
| HSL | hsl(358, 54%, 44%) |
| OKLCH | oklch(50.4% 0.157 23.1) |
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 #AC3337 | 6.39:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #AC3337 | 3.28:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #AC3337 text on white | 6.39:1 | AA | Lc 80.7 | Fine for body text |
| #AC3337 text on black | 3.28:1 | AA large text | Lc -21.1 | 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
#F8E5E3
oklch(93.7% 0.021 24.8)
-
Step 200
200
#F4CFCC
oklch(88.5% 0.042 23.5)
-
Step 300
300
#EEAEAA
oklch(80.9% 0.076 22.9)
-
Step 400
400
#E2807C
oklch(70.6% 0.122 23.1)
-
Step 500
500
#D75C5B
oklch(63% 0.156 23.1)
-
Step 600
600
#C33E41
oklch(55.7% 0.169 23.3)
-
Step 700
700 (this color)
#AC3337
oklch(50.4% 0.157 23.1)
-
Step 800
800
#88282B
oklch(42.6% 0.13 22.9)
-
Step 900
900
#6E2727
oklch(37.8% 0.101 23.3)
-
Step 950
950
#411817
oklch(27.2% 0.064 23.7)
#AC3337 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) | #554E36 | 0.169 |
| Deuteranopia (no green cones) | #736833 | 0.155 |
| Tritanopia (no blue cones) | #BD0D36 | 0.044 |
| Achromatopsia (no color) | #5F5F5F | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC3337
#AC3337
oklch(50.4% 0.157 23.1)
- #00727A
#00727A
oklch(50.3% 0.086 203.3)
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 #AC3337, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.025
- Firebrick #B22222 ΔE 0.026
- Brick #A03623 ΔE 0.034
- Rusty Red #AF2F0D ΔE 0.035
- Rufous #AE2012 ΔE 0.035
- Rust Red #AA2704 ΔE 0.040
- Dull Red #BB3F3F ΔE 0.040
- Rouge #AB1239 ΔE 0.042
Use #AC3337 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.