#B23A2E
Closest named color: Dull Red (#BB3F3F). oklch(52.1% 0.158 29.2), rgb(178, 58, 46).
Aa
White text reads best on this color (5.93:1).
About this color
#B23A2E is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.158 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.027 away. White text reads best on it, at 5.93:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.53:1 |
| White text | 5.93:1 |
Values
| HEX | #B23A2E |
| RGB | rgb(178, 58, 46) |
| HSL | hsl(5, 59%, 44%) |
| OKLCH | oklch(52.1% 0.158 29.2) |
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 #B23A2E | 5.93:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #B23A2E | 3.53:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #B23A2E text on white | 5.93:1 | AA | Lc 78.7 | Fine for body text |
| #B23A2E text on black | 3.53:1 | AA large text | Lc -23.1 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F4CFC9
oklch(88.4% 0.043 28.8)
-
Step 300
300
#EEAFA4
oklch(81% 0.076 30)
-
Step 400
400
#E28273
oklch(70.7% 0.121 29.8)
-
Step 500
500
#D75E4F
oklch(63.1% 0.156 29.3)
-
Step 600
600
#C33F32
oklch(55.6% 0.17 29.2)
-
Step 700
700 (this color)
#B23A2E
oklch(52.1% 0.158 29.2)
-
Step 800
800
#882A20
oklch(42.7% 0.13 29.5)
-
Step 900
900
#6E271F
oklch(37.7% 0.103 29.2)
-
Step 950
950
#411813
oklch(27.1% 0.065 29.1)
#B23A2E 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) | #5C532C | 0.166 |
| Deuteranopia (no green cones) | #7A6E2A | 0.153 |
| Tritanopia (no blue cones) | #C41738 | 0.053 |
| Achromatopsia (no color) | #646464 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B23A2E
#B23A2E
oklch(52.1% 0.158 29.2)
- #007785
#007785
oklch(52.1% 0.09 209.1)
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 #B23A2E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.027
- Rusty Red #AF2F0D ΔE 0.028
- Firebrick #B22222 ΔE 0.033
- Sinopia #BB3E03 ΔE 0.035
- Brick #A03623 ΔE 0.040
- Rufous #AE2012 ΔE 0.040
- Brown #A52A2A ΔE 0.042
- Rust Red #AA2704 ΔE 0.042
Use #B23A2E 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.