#37597E
Closest named color: YInMn Blue (#415A77). oklch(45.5% 0.073 251.6), rgb(55, 89, 126).
Aa
White text reads best on this color (7.25:1).
About this color
#37597E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.073 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.017 away. White text reads best on it, at 7.25:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #37597E |
| RGB | rgb(55, 89, 126) |
| HSL | hsl(211, 39%, 35%) |
| OKLCH | oklch(45.5% 0.073 251.6) |
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 #37597E | 7.25:1 | AAA | Lc -90.0 | Fine for body text |
| Black text on #37597E | 2.89:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #37597E text on white | 7.25:1 | AAA | Lc 85.1 | Fine for body text |
| #37597E text on black | 2.89:1 | Fails | Lc -16.9 | 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
#82A4CA
oklch(70.7% 0.067 251.6)
-
Step 500
500
#618DBD
oklch(63.1% 0.087 251.4)
-
Step 600
600
#4876A9
oklch(55.5% 0.095 252.1)
-
Step 700
700
#396391
oklch(49% 0.088 252)
-
Step 800
800 (this color)
#37597E
oklch(45.5% 0.073 251.6)
-
Step 900
900
#2A435F
oklch(37.6% 0.057 252.1)
-
Step 950
950
#192838
oklch(27.1% 0.036 250.8)
#37597E 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) | #4A5B80 | 0.026 |
| Deuteranopia (no green cones) | #41547D | 0.018 |
| Tritanopia (no blue cones) | #0A6166 | 0.063 |
| Achromatopsia (no color) | #575757 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37597E
#37597E
oklch(45.5% 0.073 251.6)
- #704F25
#704F25
oklch(45.4% 0.073 70.7)
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 #37597E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.017
- Light Navy Blue #2E5A88 ΔE 0.018
- Dusk #4E5481 ΔE 0.033
- Denim Blue #3B5B92 ΔE 0.033
- Denim #3B638C ΔE 0.035
- Dusk Blue #26538D ΔE 0.038
- Dusty Grape #545775 ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.042
Use #37597E 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.