#37588D
Closest named color: Denim Blue (#3B5B92). oklch(46.1% 0.095 259.5), rgb(55, 88, 141).
Aa
White text reads best on this color (7.13:1).
About this color
#37588D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.095 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.012 away. White text reads best on it, at 7.13:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.94:1 |
| White text | 7.13:1 |
Values
| HEX | #37588D |
| RGB | rgb(55, 88, 141) |
| HSL | hsl(217, 44%, 38%) |
| OKLCH | oklch(46.1% 0.095 259.5) |
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 #37588D | 7.13:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #37588D | 2.94:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #37588D text on white | 7.13:1 | AAA | Lc 84.6 | Fine for body text |
| #37588D text on black | 2.94:1 | Fails | Lc -17.4 | 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 700.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AFC2DF
oklch(80.9% 0.046 258.8)
-
Step 400
400
#85A2CF
oklch(70.7% 0.074 259)
-
Step 500
500
#678AC2
oklch(63% 0.094 259.5)
-
Step 600
600
#4E73AF
oklch(55.5% 0.103 259.7)
-
Step 700
700 (this color)
#37588D
oklch(46.1% 0.095 259.5)
-
Step 800
800
#344F7A
oklch(42.7% 0.079 259.4)
-
Step 900
900
#2E4262
oklch(37.8% 0.061 259.5)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#37588D 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) | #425C8F | 0.019 |
| Deuteranopia (no green cones) | #36548C | 0.012 |
| Tritanopia (no blue cones) | #00646C | 0.082 |
| Achromatopsia (no color) | #585858 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37588D
#37588D
oklch(46.1% 0.095 259.5)
- #745101
#745101
oklch(46.1% 0.095 79.7)
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 #37588D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.012
- Light Navy Blue #2E5A88 ΔE 0.014
- Dusk Blue #26538D ΔE 0.024
- Dusky Blue #475F94 ΔE 0.031
- Twilight #4E518B ΔE 0.033
- Dusk #4E5481 ΔE 0.034
- Denim #3B638C ΔE 0.034
- YInMn Blue #415A77 ΔE 0.040
Use #37588D 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.