#AC3E40
Closest named color: Dull Red (#BB3F3F). oklch(51.9% 0.144 22.6), rgb(172, 62, 64).
Aa
White text reads best on this color (5.97:1).
About this color
#AC3E40 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.144 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.030 away. White text reads best on it, at 5.97:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.144) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.51:1 |
| White text | 5.97:1 |
Values
| HEX | #AC3E40 |
| RGB | rgb(172, 62, 64) |
| HSL | hsl(359, 47%, 46%) |
| OKLCH | oklch(51.9% 0.144 22.6) |
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 #AC3E40 | 5.97:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #AC3E40 | 3.51:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #AC3E40 text on white | 5.97:1 | AA | Lc 79.0 | Fine for body text |
| #AC3E40 text on black | 3.51:1 | AA large text | Lc -22.8 | 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
#F7E5E4
oklch(93.6% 0.02 21.4)
-
Step 200
200
#F2D0CD
oklch(88.5% 0.039 23.9)
-
Step 300
300
#EBAFAC
oklch(80.9% 0.071 22)
-
Step 400
400
#DE8480
oklch(70.8% 0.112 23)
-
Step 500
500
#D26160
oklch(63.1% 0.144 22.6)
-
Step 600
600
#BD4547
oklch(55.6% 0.155 22.7)
-
Step 700
700 (this color)
#AC3E40
oklch(51.9% 0.144 22.6)
-
Step 800
800
#842D2F
oklch(42.6% 0.12 22.4)
-
Step 900
900
#6B2A2A
oklch(37.8% 0.093 22.6)
-
Step 950
950
#3F1919
oklch(27% 0.06 21.8)
#AC3E40 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) | #5A553F | 0.156 |
| Deuteranopia (no green cones) | #766C3D | 0.143 |
| Tritanopia (no blue cones) | #BC2740 | 0.041 |
| Achromatopsia (no color) | #636363 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC3E40
#AC3E40
oklch(51.9% 0.144 22.6)
- #00777F
#00777F
oklch(51.9% 0.088 203)
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 #AC3E40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.030
- Light Maroon #A24857 ΔE 0.035
- Dusty Red #B9484E ΔE 0.037
- Light Burgundy #A8415B ΔE 0.038
- Brown #A52A2A ΔE 0.042
- Brick #A03623 ΔE 0.042
- Firebrick #B22222 ΔE 0.043
- Dark Rose #B5485D ΔE 0.044
Use #AC3E40 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.