#37406C
Closest named color: Dark Grey Blue (#29465B). oklch(38.5% 0.076 273.6), rgb(55, 64, 108).
Aa
White text reads best on this color (9.94:1).
About this color
#37406C is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.076 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.043 away. White text reads best on it, at 9.94:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.11:1 |
| White text | 9.94:1 |
Values
| HEX | #37406C |
| RGB | rgb(55, 64, 108) |
| HSL | hsl(230, 33%, 32%) |
| OKLCH | oklch(38.5% 0.076 273.6) |
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 #37406C | 9.94:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #37406C | 2.11:1 | Fails | Lc 11.0 | Not readable |
| #37406C text on white | 9.94:1 | AAA | Lc 93.0 | Preferred for body text |
| #37406C text on black | 2.11:1 | Fails | Lc -9.5 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE6
oklch(80.9% 0.056 272.7)
-
Step 400
400
#8E9DDA
oklch(70.8% 0.091 273.2)
-
Step 500
500
#7383D0
oklch(63% 0.117 273.7)
-
Step 600
600
#5C6CBD
oklch(55.7% 0.127 273.2)
-
Step 700
700
#4C59A3
oklch(49% 0.119 273.7)
-
Step 800
800
#3E4984
oklch(42.6% 0.098 273.6)
-
Step 900
900 (this color)
#37406C
oklch(38.5% 0.076 273.6)
-
Step 950
950
#1F243E
oklch(26.9% 0.049 274.4)
#37406C 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) | #30456E | 0.016 |
| Deuteranopia (no green cones) | #2B416B | 0.016 |
| Tritanopia (no blue cones) | #244950 | 0.068 |
| Achromatopsia (no color) | #434343 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37406C
#37406C
oklch(38.5% 0.076 273.6)
- #514205
#514205
oklch(38.4% 0.076 93.5)
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 #37406C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.043
- Twilight Blue #0A437A ΔE 0.046
- Charcoal #264653 ΔE 0.057
- Light Navy #155084 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.062
- Marine Blue #01386A ΔE 0.062
- Cobalt #1E488F ΔE 0.063
Use #37406C 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.