#37619D
Closest named color: Dusky Blue (#475F94). oklch(49.2% 0.108 257.5), rgb(55, 97, 157).
Aa
White text reads best on this color (6.25:1).
About this color
#37619D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.108 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.021 away. White text reads best on it, at 6.25:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.35:1 |
| White text | 6.25:1 |
Values
| HEX | #37619D |
| RGB | rgb(55, 97, 157) |
| HSL | hsl(215, 48%, 42%) |
| OKLCH | oklch(49.2% 0.108 257.5) |
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 #37619D | 6.25:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #37619D | 3.35:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #37619D text on white | 6.25:1 | AA | Lc 80.9 | Fine for body text |
| #37619D text on black | 3.35:1 | AA large text | Lc -20.9 | 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 700.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ACC2E3
oklch(80.8% 0.053 258.4)
-
Step 400
400
#80A2D5
oklch(70.6% 0.084 258.3)
-
Step 500
500
#5F8BC9
oklch(63.1% 0.106 257.1)
-
Step 600
600
#4574B6
oklch(55.7% 0.115 257.1)
-
Step 700
700 (this color)
#37619D
oklch(49.2% 0.108 257.5)
-
Step 800
800
#2E4F7F
oklch(42.7% 0.089 257.8)
-
Step 900
900
#294266
oklch(37.7% 0.069 257.5)
-
Step 950
950
#18273C
oklch(27% 0.044 256.9)
#37619D 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) | #47669F | 0.024 |
| Deuteranopia (no green cones) | #385C9C | 0.014 |
| Tritanopia (no blue cones) | #006F77 | 0.089 |
| Achromatopsia (no color) | #606060 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37619D
#37619D
oklch(49.2% 0.108 257.5)
- #815800
#815800
oklch(49.2% 0.103 77.4)
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 #37619D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.021
- Denim Blue #3B5B92 ΔE 0.022
- Denim #3B638C ΔE 0.030
- Peacock Blue #016795 ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.039
- French Blue #436BAD ΔE 0.039
- Mid Blue #276AB3 ΔE 0.039
- Muted Blue #3B719F ΔE 0.047
Use #37619D 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.