#A3102E
Closest named color: Rouge (#AB1239). oklch(45.9% 0.176 18.9), rgb(163, 16, 46).
Aa
White text reads best on this color (7.86:1).
About this color
#A3102E is a medium-dark, vivid red. In OKLCH its lightness is 46%, its chroma 0.176 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.022 away. White text reads best on it, at 7.86:1.
| Hue family | Reds |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.176) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.67:1 |
| White text | 7.86:1 |
Values
| HEX | #A3102E |
| RGB | rgb(163, 16, 46) |
| HSL | hsl(348, 82%, 35%) |
| OKLCH | oklch(45.9% 0.176 18.9) |
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 #A3102E | 7.86:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #A3102E | 2.67:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #A3102E text on white | 7.86:1 | AAA | Lc 85.3 | Fine for body text |
| #A3102E text on black | 2.67:1 | Fails | Lc -16.7 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F7CDCD
oklch(88.4% 0.048 18.1)
-
Step 300
300
#F3ABAB
oklch(81% 0.085 19.1)
-
Step 400
400
#E97B7F
oklch(70.8% 0.136 18.8)
-
Step 500
500
#DF535E
oklch(63.1% 0.174 19.1)
-
Step 600
600
#CA3045
oklch(55.6% 0.189 18.9)
-
Step 700
700 (this color)
#A3102E
oklch(45.9% 0.176 18.9)
-
Step 800
800
#8D1E2E
oklch(42.6% 0.145 18.5)
-
Step 900
900
#722129
oklch(37.8% 0.113 18.9)
-
Step 950
950
#431518
oklch(27.1% 0.071 19.4)
#A3102E 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) | #433E2E | 0.195 |
| Deuteranopia (no green cones) | #665C29 | 0.178 |
| Tritanopia (no blue cones) | #B4001F | 0.037 |
| Achromatopsia (no color) | #525252 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3102E
#A3102E
oklch(45.9% 0.176 18.9)
- #006568
#006568
oklch(46% 0.078 198.4)
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 #A3102E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.022
- Auburn #9B2226 ΔE 0.025
- Cranberry #9E003A ΔE 0.026
- Carmine #9D0216 ΔE 0.028
- Brown #A52A2A ΔE 0.033
- Deep Red #9A0200 ΔE 0.042
- Rufous #AE2012 ΔE 0.044
- Blood Red #980002 ΔE 0.044
Use #A3102E 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.