#37425E
Closest named color: Dark Grey Blue (#29465B). oklch(38.2% 0.05 267.5), rgb(55, 66, 94).
Aa
White text reads best on this color (9.98:1).
About this color
#37425E is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.050 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.023 away. White text reads best on it, at 9.98:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.10:1 |
| White text | 9.98:1 |
Values
| HEX | #37425E |
| RGB | rgb(55, 66, 94) |
| HSL | hsl(223, 26%, 29%) |
| OKLCH | oklch(38.2% 0.05 267.5) |
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 #37425E | 9.98:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #37425E | 2.10:1 | Fails | Lc 10.8 | Not readable |
| #37425E text on white | 9.98:1 | AAA | Lc 93.1 | Preferred for body text |
| #37425E text on black | 2.10:1 | Fails | Lc -9.3 | 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
#D3D9E7
oklch(88.5% 0.02 267.3)
-
Step 300
300
#B6C0DA
oklch(80.8% 0.038 268.8)
-
Step 400
400
#90A0C7
oklch(70.7% 0.06 267.4)
-
Step 500
500
#7588B9
oklch(63.1% 0.077 267.8)
-
Step 600
600
#5E71A5
oklch(55.5% 0.084 268.3)
-
Step 700
700
#4D5F8D
oklch(49.1% 0.077 267.2)
-
Step 800
800
#3F4E73
oklch(42.8% 0.065 266.8)
-
Step 900
900 (this color)
#37425E
oklch(38.2% 0.05 267.5)
-
Step 950
950
#202636
oklch(27% 0.031 268.4)
#37425E 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) | #39445F | 0.007 |
| Deuteranopia (no green cones) | #35415D | 0.005 |
| Tritanopia (no blue cones) | #2B484C | 0.045 |
| Achromatopsia (no color) | #424242 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37425E
#37425E
oklch(38.2% 0.05 267.5)
- #4E4122
#4E4122
oklch(38.1% 0.05 87.3)
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 #37425E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.023
- Charcoal #264653 ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.050
- Onyx #343A40 ΔE 0.053
- Dark Slate Gray #2F4F4F ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.061
Use #37425E 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.