#37578A
Closest named color: Light Navy Blue (#2E5A88). oklch(45.7% 0.092 259.4), rgb(55, 87, 138).
Aa
White text reads best on this color (7.25:1).
About this color
#37578A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.092 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.013 away. White text reads best on it, at 7.25:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #37578A |
| RGB | rgb(55, 87, 138) |
| HSL | hsl(217, 43%, 38%) |
| OKLCH | oklch(45.7% 0.092 259.4) |
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 #37578A | 7.25:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #37578A | 2.89:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #37578A text on white | 7.25:1 | AAA | Lc 85.1 | Fine for body text |
| #37578A text on black | 2.89:1 | Fails | Lc -17.0 | Dividers and decoration only |
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 800.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ACC2E4
oklch(80.9% 0.054 259)
-
Step 400
400
#81A2D6
oklch(70.7% 0.085 259.3)
-
Step 500
500
#608ACC
oklch(63.1% 0.11 259.1)
-
Step 600
600
#4773B8
oklch(55.6% 0.118 259.1)
-
Step 700
700
#38609F
oklch(49.1% 0.111 259.1)
-
Step 800
800 (this color)
#37578A
oklch(45.7% 0.092 259.4)
-
Step 900
900
#2A4267
oklch(37.8% 0.07 258.8)
-
Step 950
950
#19273D
oklch(27.2% 0.046 259.2)
#37578A 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) | #425B8C | 0.019 |
| Deuteranopia (no green cones) | #375389 | 0.012 |
| Tritanopia (no blue cones) | #00626A | 0.079 |
| Achromatopsia (no color) | #575757 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37578A
#37578A
oklch(45.7% 0.092 259.4)
- #725007
#725007
oklch(45.7% 0.092 79.3)
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 #37578A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.013
- Denim Blue #3B5B92 ΔE 0.017
- Dusk Blue #26538D ΔE 0.023
- Dusk #4E5481 ΔE 0.032
- Twilight #4E518B ΔE 0.033
- Dusky Blue #475F94 ΔE 0.035
- Denim #3B638C ΔE 0.036
- YInMn Blue #415A77 ΔE 0.037
Use #37578A 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.