#A42138
Closest named color: Rouge (#AB1239). oklch(47.3% 0.165 17.3), rgb(164, 33, 56).
Aa
White text reads best on this color (7.36:1).
About this color
#A42138 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.165 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.018 away. White text reads best on it, at 7.36:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.85:1 |
| White text | 7.36:1 |
Values
| HEX | #A42138 |
| RGB | rgb(164, 33, 56) |
| HSL | hsl(349, 66%, 39%) |
| OKLCH | oklch(47.3% 0.165 17.3) |
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 #A42138 | 7.36:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #A42138 | 2.85:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #A42138 text on white | 7.36:1 | AAA | Lc 84.1 | Fine for body text |
| #A42138 text on black | 2.85:1 | Fails | Lc -17.9 | 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
#FDF3F3
oklch(97.2% 0.011 17.3)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F5CECE
oklch(88.5% 0.044 18)
-
Step 300
300
#F0ACAE
oklch(80.9% 0.08 17)
-
Step 400
400
#E57D83
oklch(70.6% 0.128 17.2)
-
Step 500
500
#DA5864
oklch(63.1% 0.163 17.6)
-
Step 600
600
#C5374C
oklch(55.5% 0.178 17)
-
Step 700
700 (this color)
#A42138
oklch(47.3% 0.165 17.3)
-
Step 800
800
#8A2432
oklch(42.7% 0.136 17.6)
-
Step 900
900
#6F242C
oklch(37.7% 0.106 17.6)
-
Step 950
950
#42161A
oklch(27.1% 0.068 17.4)
#A42138 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) | #484438 | 0.183 |
| Deuteranopia (no green cones) | #696034 | 0.168 |
| Tritanopia (no blue cones) | #B4002B | 0.035 |
| Achromatopsia (no color) | #565656 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A42138
#A42138
oklch(47.3% 0.165 17.3)
- #00696B
#00696B
oklch(47.2% 0.08 197.1)
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 #A42138, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.018
- Brown #A52A2A ΔE 0.025
- Auburn #9B2226 ΔE 0.029
- Cranberry #9E003A ΔE 0.035
- Firebrick #B22222 ΔE 0.040
- Raspberry #B00149 ΔE 0.041
- Rufous #AE2012 ΔE 0.043
- Carmine #9D0216 ΔE 0.043
Use #A42138 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.