#37597F
Closest named color: Light Navy Blue (#2E5A88). oklch(45.6% 0.074 252.2), rgb(55, 89, 127).
Aa
White text reads best on this color (7.24:1).
About this color
#37597F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.074 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.016 away. White text reads best on it, at 7.24:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.89:1 |
| White text | 7.24:1 |
Values
| HEX | #37597F |
| RGB | rgb(55, 89, 127) |
| HSL | hsl(212, 40%, 36%) |
| OKLCH | oklch(45.6% 0.074 252.2) |
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 #37597F | 7.24:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #37597F | 2.89:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #37597F text on white | 7.24:1 | AAA | Lc 85.0 | Fine for body text |
| #37597F 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE9
oklch(88.6% 0.024 250.1)
-
Step 300
300
#ADC3DC
oklch(80.9% 0.043 251.7)
-
Step 400
400
#81A4CB
oklch(70.7% 0.069 251.5)
-
Step 500
500
#618DBE
oklch(63.2% 0.089 251.9)
-
Step 600
600
#4776AA
oklch(55.5% 0.096 252.1)
-
Step 700
700
#396392
oklch(49.1% 0.089 252.5)
-
Step 800
800 (this color)
#37597F
oklch(45.6% 0.074 252.2)
-
Step 900
900
#2A435F
oklch(37.6% 0.057 252.1)
-
Step 950
950
#192838
oklch(27.1% 0.036 250.8)
#37597F 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) | #495B81 | 0.024 |
| Deuteranopia (no green cones) | #40547E | 0.017 |
| Tritanopia (no blue cones) | #086266 | 0.066 |
| Achromatopsia (no color) | #575757 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37597F
#37597F
oklch(45.6% 0.074 252.2)
- #705024
#705024
oklch(45.6% 0.074 72.7)
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 #37597F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.016
- YInMn Blue #415A77 ΔE 0.018
- Denim Blue #3B5B92 ΔE 0.032
- Dusk #4E5481 ΔE 0.032
- Denim #3B638C ΔE 0.034
- Dusk Blue #26538D ΔE 0.037
- Dusty Grape #545775 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.042
Use #37597F 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.