#B74537
Closest named color: Dull Red (#BB3F3F). oklch(54.4% 0.151 29.8), rgb(183, 69, 55).
Aa
White text reads best on this color (5.35:1).
About this color
#B74537 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.151 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.018 away. White text reads best on it, at 5.35:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.151) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.91:1 |
| White text | 5.35:1 |
Values
| HEX | #B74537 |
| RGB | rgb(183, 69, 55) |
| HSL | hsl(7, 54%, 47%) |
| OKLCH | oklch(54.4% 0.151 29.8) |
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 #B74537 | 5.35:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #B74537 | 3.91:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #B74537 text on white | 5.35:1 | AA | Lc 75.9 | Fine for body text |
| #B74537 text on black | 3.91:1 | AA large text | Lc -25.9 | 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 600.
-
Step 50
50
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F1D1CB
oklch(88.6% 0.037 30.4)
-
Step 300
300
#E9B1A7
oklch(80.9% 0.067 30.1)
-
Step 400
400
#DC8678
oklch(70.7% 0.109 30)
-
Step 500
500
#D06556
oklch(63.2% 0.138 29.7)
-
Step 600
600 (this color)
#B74537
oklch(54.4% 0.151 29.8)
-
Step 700
700
#A1392D
oklch(49.1% 0.14 29.6)
-
Step 800
800
#833026
oklch(42.7% 0.117 29.6)
-
Step 900
900
#692C23
oklch(37.7% 0.09 30.3)
-
Step 950
950
#3E1A15
oklch(26.9% 0.058 29.5)
#B74537 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) | #645B35 | 0.157 |
| Deuteranopia (no green cones) | #807434 | 0.145 |
| Tritanopia (no blue cones) | #C92B42 | 0.053 |
| Achromatopsia (no color) | #6B6B6B | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B74537
#B74537
oklch(54.4% 0.151 29.8)
- #007E8E
#007E8E
oklch(54.4% 0.094 210.2)
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 #B74537, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.018
- Dusty Red #B9484E ΔE 0.028
- Sinopia #BB3E03 ΔE 0.033
- Brick Orange #C14A09 ΔE 0.042
- Burnt Orange #C04E01 ΔE 0.048
- Dark Rose #B5485D ΔE 0.049
- Rusty Red #AF2F0D ΔE 0.049
- Burnt Siena #B75203 ΔE 0.051
Use #B74537 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.