#AC3F3E
Closest named color: Dull Red (#BB3F3F). oklch(51.9% 0.144 24), rgb(172, 63, 62).
Aa
White text reads best on this color (5.94:1).
About this color
#AC3F3E is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.144 and its hue 24°. 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 5.94:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.144) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #AC3F3E |
| RGB | rgb(172, 63, 62) |
| HSL | hsl(1, 47%, 46%) |
| OKLCH | oklch(51.9% 0.144 24) |
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 #AC3F3E | 5.94:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #AC3F3E | 3.53:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #AC3F3E text on white | 5.94:1 | AA | Lc 78.9 | Fine for body text |
| #AC3F3E text on black | 3.53:1 | AA large text | Lc -22.9 | 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
#F7E5E3
oklch(93.6% 0.02 25.2)
-
Step 200
200
#F2D0CD
oklch(88.5% 0.039 23.9)
-
Step 300
300
#EAB0AB
oklch(80.9% 0.069 24.3)
-
Step 400
400
#DD847E
oklch(70.6% 0.111 24.4)
-
Step 500
500
#D1625E
oklch(63% 0.141 24)
-
Step 600
600
#BD4544
oklch(55.6% 0.155 24.1)
-
Step 700
700 (this color)
#AC3F3E
oklch(51.9% 0.144 24)
-
Step 800
800
#842E2D
oklch(42.7% 0.119 24.2)
-
Step 900
900
#6A2A28
oklch(37.6% 0.092 24.3)
-
Step 950
950
#3F1918
oklch(27% 0.06 23.4)
#AC3F3E 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) | #5B553D | 0.154 |
| Deuteranopia (no green cones) | #776C3B | 0.140 |
| Tritanopia (no blue cones) | #BC2840 | 0.043 |
| Achromatopsia (no color) | #646464 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC3F3E
#AC3F3E
oklch(51.9% 0.144 24)
- #007780
#007780
oklch(51.9% 0.088 204)
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 #AC3F3E, 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 0.037
- Dusty Red #B9484E ΔE 0.037
- Light Burgundy #A8415B ΔE 0.041
- Brick #A03623 ΔE 0.041
- Brown #A52A2A ΔE 0.042
- Rusty Red #AF2F0D ΔE 0.043
- Firebrick #B22222 ΔE 0.043
Use #AC3F3E 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.