#37558C
Closest named color: Light Navy Blue (#2E5A88). oklch(45.4% 0.097 261.6), rgb(55, 85, 140).
Aa
White text reads best on this color (7.39:1).
About this color
#37558C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.097 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.019 away. White text reads best on it, at 7.39:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.84:1 |
| White text | 7.39:1 |
Values
| HEX | #37558C |
| RGB | rgb(55, 85, 140) |
| HSL | hsl(219, 44%, 38%) |
| OKLCH | oklch(45.4% 0.097 261.6) |
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 #37558C | 7.39:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #37558C | 2.84:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #37558C text on white | 7.39:1 | AAA | Lc 85.5 | Fine for body text |
| #37558C text on black | 2.84:1 | Fails | Lc -16.5 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ADC1E6
oklch(80.8% 0.057 262.7)
-
Step 400
400
#81A1DA
oklch(70.7% 0.091 261.7)
-
Step 500
500
#6189D0
oklch(63.2% 0.117 261.3)
-
Step 600
600
#4871BD
oklch(55.5% 0.127 261.7)
-
Step 700
700
#3A5FA3
oklch(49.2% 0.117 261.6)
-
Step 800
800 (this color)
#37558C
oklch(45.4% 0.097 261.6)
-
Step 900
900
#2A416A
oklch(37.7% 0.076 261.3)
-
Step 950
950
#19263E
oklch(27% 0.049 262)
#37558C 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) | #3E5A8E | 0.018 |
| Deuteranopia (no green cones) | #32528B | 0.011 |
| Tritanopia (no blue cones) | #006169 | 0.085 |
| Achromatopsia (no color) | #565656 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37558C
#37558C
oklch(45.4% 0.097 261.6)
- #705000
#705000
oklch(45.4% 0.094 81.9)
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 #37558C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.019
- Dusk Blue #26538D ΔE 0.019
- Denim Blue #3B5B92 ΔE 0.020
- Twilight #4E518B ΔE 0.031
- Dusk #4E5481 ΔE 0.034
- Light Navy #155084 ΔE 0.038
- Dusky Blue #475F94 ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.042
Use #37558C 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.