#37475E
Closest named color: Dark Grey Blue (#29465B). oklch(39.4% 0.044 257.4), rgb(55, 71, 94).
Aa
White text reads best on this color (9.43:1).
About this color
#37475E is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.044 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.020 away. White text reads best on it, at 9.43:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.22:1 |
| White text | 9.43:1 |
Values
| HEX | #37475E |
| RGB | rgb(55, 71, 94) |
| HSL | hsl(215, 26%, 29%) |
| OKLCH | oklch(39.4% 0.044 257.4) |
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 #37475E | 9.43:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #37475E | 2.22:1 | Fails | Lc 12.2 | Not readable |
| #37475E text on white | 9.43:1 | AAA | Lc 91.8 | Preferred for body text |
| #37475E text on black | 2.22:1 | Fails | Lc -10.6 | Not readable |
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 900.
-
Step 50
50
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE6
oklch(88.6% 0.019 258.4)
-
Step 300
300
#B3C2D6
oklch(80.9% 0.033 255.6)
-
Step 400
400
#8CA2C2
oklch(70.7% 0.053 257.7)
-
Step 500
500
#6F8BB3
oklch(63.1% 0.069 257.3)
-
Step 600
600
#58759F
oklch(55.7% 0.074 257.6)
-
Step 700
700
#486288
oklch(49.2% 0.069 257.8)
-
Step 800
800
#3B506E
oklch(42.7% 0.057 257.3)
-
Step 900
900 (this color)
#37475E
oklch(39.4% 0.044 257.4)
-
Step 950
950
#1E2734
oklch(27% 0.028 257.5)
#37475E 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) | #3F485F | 0.013 |
| Deuteranopia (no green cones) | #3A445E | 0.010 |
| Tritanopia (no blue cones) | #2A4C4F | 0.039 |
| Achromatopsia (no color) | #464646 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37475E
#37475E
oklch(39.4% 0.044 257.4)
- #53432A
#53432A
oklch(39.3% 0.044 78.1)
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 #37475E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.020
- Charcoal #264653 ΔE 0.030
- Dark Slate Gray #2F4F4F ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.057
- Onyx #343A40 ΔE 0.058
- Dark Teal #014D4E ΔE 0.059
- Deep Teal #00555A ΔE 0.060
Use #37475E 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.