#37648F
Closest named color: Denim (#3B638C). oklch(49.1% 0.085 249), rgb(55, 100, 143).
Aa
White text reads best on this color (6.20:1).
About this color
#37648F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.085 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.006 away. White text reads best on it, at 6.20:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.38:1 |
| White text | 6.20:1 |
Values
| HEX | #37648F |
| RGB | rgb(55, 100, 143) |
| HSL | hsl(209, 44%, 39%) |
| OKLCH | oklch(49.1% 0.085 249) |
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 #37648F | 6.20:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #37648F | 3.38:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #37648F text on white | 6.20:1 | AA | Lc 80.8 | Fine for body text |
| #37648F text on black | 3.38:1 | AA large text | Lc -21.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#ADC3DB
oklch(80.8% 0.042 250.6)
-
Step 400
400
#81A5C9
oklch(70.8% 0.066 248.8)
-
Step 500
500
#608EBB
oklch(63.2% 0.085 248.8)
-
Step 600
600
#4677A7
oklch(55.6% 0.092 249.3)
-
Step 700
700 (this color)
#37648F
oklch(49.1% 0.085 249)
-
Step 800
800
#2E5274
oklch(42.7% 0.07 248.5)
-
Step 900
900
#29445E
oklch(37.7% 0.056 248.6)
-
Step 950
950
#192837
oklch(27.1% 0.035 249.2)
#37648F 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) | #526691 | 0.033 |
| Deuteranopia (no green cones) | #465D8E | 0.024 |
| Tritanopia (no blue cones) | #006E73 | 0.070 |
| Achromatopsia (no color) | #616161 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37648F
#37648F
oklch(49.1% 0.085 249)
- #805724
#805724
oklch(49.1% 0.086 69.1)
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 #37648F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.006
- Dusky Blue #475F94 ΔE 0.025
- Denim Blue #3B5B92 ΔE 0.028
- Peacock Blue #016795 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.033
- Muted Blue #3B719F ΔE 0.042
- Ocean Blue #03719C ΔE 0.042
- YInMn Blue #415A77 ΔE 0.043
Use #37648F 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.