#37415E
Closest named color: Dark Grey Blue (#29465B). oklch(37.9% 0.052 269.3), rgb(55, 65, 94).
Aa
White text reads best on this color (10.09:1).
About this color
#37415E is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.052 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 10.09:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.08:1 |
| White text | 10.09:1 |
Values
| HEX | #37415E |
| RGB | rgb(55, 65, 94) |
| HSL | hsl(225, 26%, 29%) |
| OKLCH | oklch(37.9% 0.052 269.3) |
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 #37415E | 10.09:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #37415E | 2.08:1 | Fails | Lc 10.5 | Not readable |
| #37415E text on white | 10.09:1 | AAA | Lc 93.4 | Preferred for body text |
| #37415E text on black | 2.08:1 | Fails | Lc -9.1 | 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
#E7EAF2
oklch(93.7% 0.011 269.5)
-
Step 200
200
#D3D9E8
oklch(88.5% 0.022 268.4)
-
Step 300
300
#B6C0DA
oklch(80.8% 0.038 268.8)
-
Step 400
400
#919FC8
oklch(70.6% 0.062 270.1)
-
Step 500
500
#7688BA
oklch(63.2% 0.079 268.8)
-
Step 600
600
#5F71A6
oklch(55.7% 0.086 269.2)
-
Step 700
700
#4E5E8E
oklch(49% 0.08 269.3)
-
Step 800
800
#404D74
oklch(42.7% 0.067 269.4)
-
Step 900
900 (this color)
#37415E
oklch(37.9% 0.052 269.3)
-
Step 950
950
#202637
oklch(27.1% 0.033 269.2)
#37415E 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) | #37445F | 0.009 |
| Deuteranopia (no green cones) | #34405D | 0.006 |
| Tritanopia (no blue cones) | #2B474B | 0.047 |
| Achromatopsia (no color) | #424242 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37415E
#37415E
oklch(37.9% 0.052 269.3)
- #4D4120
#4D4120
oklch(38% 0.052 89.9)
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 #37415E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.049
- Charcoal Grey #3C4142 ΔE 0.049
- Onyx #343A40 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.056
- Dark Slate Gray #2F4F4F ΔE 0.059
- Twilight Blue #0A437A ΔE 0.061
Use #37415E 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.