#37455F
Closest named color: Dark Grey Blue (#29465B). oklch(39% 0.048 262.5), rgb(55, 69, 95).
Aa
White text reads best on this color (9.63:1).
About this color
#37455F is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.048 and its hue 262°. 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 9.63:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.17:1 |
| White text | 9.63:1 |
Values
| HEX | #37455F |
| RGB | rgb(55, 69, 95) |
| HSL | hsl(219, 27%, 29%) |
| OKLCH | oklch(39% 0.048 262.5) |
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 #37455F | 9.63:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #37455F | 2.17:1 | Fails | Lc 11.7 | Not readable |
| #37455F text on white | 9.63:1 | AAA | Lc 92.3 | Preferred for body text |
| #37455F text on black | 2.17:1 | Fails | Lc -10.1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2D9E7
oklch(88.4% 0.021 264.5)
-
Step 300
300
#B4C1D9
oklch(80.9% 0.037 262.8)
-
Step 400
400
#8DA1C5
oklch(70.6% 0.058 262.1)
-
Step 500
500
#718AB7
oklch(63.2% 0.074 261.9)
-
Step 600
600
#5A73A3
oklch(55.6% 0.081 262.9)
-
Step 700
700
#4A608B
oklch(49% 0.074 263.1)
-
Step 800
800
#3D4F71
oklch(42.8% 0.061 262.6)
-
Step 900
900 (this color)
#37455F
oklch(39% 0.048 262.5)
-
Step 950
950
#1E2636
oklch(26.9% 0.032 263.8)
#37455F 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) | #3C4760 | 0.010 |
| Deuteranopia (no green cones) | #38435E | 0.006 |
| Tritanopia (no blue cones) | #2A4A4E | 0.042 |
| Achromatopsia (no color) | #454545 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37455F
#37455F
oklch(39% 0.048 262.5)
- #524326
#524326
oklch(39.1% 0.048 82.9)
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 #37455F, 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 0.032
- Charcoal Grey #3C4142 ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.055
- Onyx #343A40 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.062
- Dark Teal #014D4E ΔE 0.064
Use #37455F 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.