#37667C
Closest named color: Denim (#3B638C). oklch(48.6% 0.062 230.1), rgb(55, 102, 124).
Aa
White text reads best on this color (6.26:1).
About this color
#37667C is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.062 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.031 away. White text reads best on it, at 6.26:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.35:1 |
| White text | 6.26:1 |
Values
| HEX | #37667C |
| RGB | rgb(55, 102, 124) |
| HSL | hsl(199, 39%, 35%) |
| OKLCH | oklch(48.6% 0.062 230.1) |
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 #37667C | 6.26:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #37667C | 3.35:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #37667C text on white | 6.26:1 | AA | Lc 81.1 | Fine for body text |
| #37667C text on black | 3.35:1 | AA large text | Lc -20.8 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE2
oklch(88.4% 0.016 233)
-
Step 300
300
#AEC5D1
oklch(81% 0.03 230.4)
-
Step 400
400
#82A7B9
oklch(70.7% 0.048 229.2)
-
Step 500
500
#6291A8
oklch(63.2% 0.061 230.1)
-
Step 600
600
#477B93
oklch(55.6% 0.067 229.4)
-
Step 700
700 (this color)
#37667C
oklch(48.6% 0.062 230.1)
-
Step 800
800
#2F5466
oklch(42.6% 0.052 230.8)
-
Step 900
900
#2A4653
oklch(37.8% 0.04 229.1)
-
Step 950
950
#192931
oklch(27% 0.026 230.6)
#37667C 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) | #5B657D | 0.044 |
| Deuteranopia (no green cones) | #515D7C | 0.039 |
| Tritanopia (no blue cones) | #066C6D | 0.046 |
| Achromatopsia (no color) | #606060 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37667C
#37667C
oklch(48.6% 0.062 230.1)
- #7C553F
#7C553F
oklch(48.6% 0.062 50.2)
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 #37667C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.031
- Slate #516572 ΔE 0.032
- YInMn Blue #415A77 ΔE 0.036
- Dark Aqua #05696B ΔE 0.045
- Peacock Blue #016795 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.048
- Sea Blue #047495 ΔE 0.051
- Petrol #005F6A ΔE 0.051
Use #37667C 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.