#B23517
Closest named color: Rusty Red (#AF2F0D). oklch(51.3% 0.166 34.3), rgb(178, 53, 23).
Aa
White text reads best on this color (6.15:1).
About this color
#B23517 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.166 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.013 away. White text reads best on it, at 6.15:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.166) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.41:1 |
| White text | 6.15:1 |
Values
| HEX | #B23517 |
| RGB | rgb(178, 53, 23) |
| HSL | hsl(12, 77%, 39%) |
| OKLCH | oklch(51.3% 0.166 34.3) |
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 #B23517 | 6.15:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #B23517 | 3.41:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #B23517 text on white | 6.15:1 | AA | Lc 79.5 | Fine for body text |
| #B23517 text on black | 3.41:1 | AA large text | Lc -22.3 | 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
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F5CFC6
oklch(88.4% 0.045 33.5)
-
Step 300
300
#F0AE9E
oklch(80.9% 0.081 34.1)
-
Step 400
400
#E58169
oklch(70.7% 0.129 34.5)
-
Step 500
500
#DA5C40
oklch(63% 0.164 34)
-
Step 600
600
#C63D1C
oklch(55.7% 0.179 34.4)
-
Step 700
700 (this color)
#B23517
oklch(51.3% 0.166 34.3)
-
Step 800
800
#8A2810
oklch(42.7% 0.137 34.5)
-
Step 900
900
#6F2616
oklch(37.6% 0.107 33.9)
-
Step 950
950
#42180E
oklch(27.2% 0.068 34.7)
#B23517 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) | #5B5011 | 0.172 |
| Deuteranopia (no green cones) | #796C0E | 0.158 |
| Tritanopia (no blue cones) | #C40030 | 0.062 |
| Achromatopsia (no color) | #616161 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B23517
#B23517
oklch(51.3% 0.166 34.3)
- #007487
#007487
oklch(51.4% 0.09 214.3)
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 #B23517, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.013
- Sinopia #BB3E03 ΔE 0.029
- Rust Red #AA2704 ΔE 0.030
- Firebrick #B22222 ΔE 0.031
- Rufous #AE2012 ΔE 0.032
- Russet #A13905 ΔE 0.036
- Brick #A03623 ΔE 0.037
- Brown #A52A2A ΔE 0.041
Use #B23517 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.