#A7180C
Closest named color: Rufous (#AE2012). oklch(46.8% 0.178 29.9), rgb(167, 24, 12).
Aa
White text reads best on this color (7.55:1).
About this color
#A7180C is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.178 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.019 away. White text reads best on it, at 7.55:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.178) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.77:1 |
| White text | 7.55:1 |
Values
| HEX | #A7180C |
| RGB | rgb(167, 24, 12) |
| HSL | hsl(5, 87%, 35%) |
| OKLCH | oklch(46.8% 0.178 29.9) |
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 #A7180C | 7.55:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #A7180C | 2.77:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #A7180C text on white | 7.55:1 | AAA | Lc 84.4 | Fine for body text |
| #A7180C text on black | 2.77:1 | Fails | Lc -17.6 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F7CEC7
oklch(88.5% 0.048 29.4)
-
Step 300
300
#F3ACA0
oklch(80.9% 0.086 29.8)
-
Step 400
400
#EA7D6C
oklch(70.8% 0.138 30.1)
-
Step 500
500
#E05644
oklch(63.2% 0.176 30.1)
-
Step 600
600
#CB3324
oklch(55.6% 0.191 29.9)
-
Step 700
700 (this color)
#A7180C
oklch(46.8% 0.178 29.9)
-
Step 800
800
#8E2015
oklch(42.6% 0.147 30)
-
Step 900
900
#722219
oklch(37.6% 0.114 29.8)
-
Step 950
950
#43150F
oklch(26.9% 0.073 30)
#A7180C 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) | #4A4006 | 0.192 |
| Deuteranopia (no green cones) | #6C5F00 | 0.173 |
| Tritanopia (no blue cones) | #B90018 | 0.038 |
| Achromatopsia (no color) | #545454 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A7180C
#A7180C
oklch(46.8% 0.178 29.9)
- #006673
#006673
oklch(46.8% 0.081 209.9)
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 #A7180C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.019
- Burnt Red #9F2305 ΔE 0.019
- Rust Red #AA2704 ΔE 0.021
- Brown #A52A2A ΔE 0.026
- Auburn #9B2226 ΔE 0.029
- Firebrick #B22222 ΔE 0.031
- Carmine #9D0216 ΔE 0.032
- Deep Red #9A0200 ΔE 0.036
Use #A7180C 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.