#37658D
Closest named color: Denim (#3B638C). oklch(49.2% 0.082 246.7), rgb(55, 101, 141).
Aa
White text reads best on this color (6.16:1).
About this color
#37658D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.082 and its hue 247°. 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 6.16:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.40:1 |
| White text | 6.16:1 |
Values
| HEX | #37658D |
| RGB | rgb(55, 101, 141) |
| HSL | hsl(208, 44%, 38%) |
| OKLCH | oklch(49.2% 0.082 246.7) |
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 #37658D | 6.16:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #37658D | 3.40:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #37658D text on white | 6.16:1 | AA | Lc 80.6 | Fine for body text |
| #37658D text on black | 3.40:1 | AA large text | Lc -21.3 | 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
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE7
oklch(88.5% 0.022 245.9)
-
Step 300
300
#ADC4D9
oklch(81% 0.039 245.9)
-
Step 400
400
#81A5C7
oklch(70.8% 0.064 247.3)
-
Step 500
500
#608EB8
oklch(63% 0.081 247)
-
Step 600
600
#4578A4
oklch(55.6% 0.088 246.3)
-
Step 700
700 (this color)
#37658D
oklch(49.2% 0.082 246.7)
-
Step 800
800
#2E5272
oklch(42.6% 0.068 247)
-
Step 900
900
#29445C
oklch(37.6% 0.053 246.6)
-
Step 950
950
#192836
oklch(27% 0.033 247.4)
#37658D 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) | #54668F | 0.035 |
| Deuteranopia (no green cones) | #485E8C | 0.026 |
| Tritanopia (no blue cones) | #006F73 | 0.067 |
| Achromatopsia (no color) | #616161 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37658D
#37658D
oklch(49.2% 0.082 246.7)
- #805729
#805729
oklch(49.2% 0.082 66.9)
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 #37658D, 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 0.028
- Peacock Blue #016795 ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.035
- Ocean Blue #03719C ΔE 0.041
- Muted Blue #3B719F ΔE 0.042
- YInMn Blue #415A77 ΔE 0.042
Use #37658D 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.