#37678F
Closest named color: Denim (#3B638C). oklch(49.8% 0.083 245.7), rgb(55, 103, 143).
Aa
White text reads best on this color (6.00:1).
About this color
#37678F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.083 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.012 away. White text reads best on it, at 6.00:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.49:1 |
| White text | 6.00:1 |
Values
| HEX | #37678F |
| RGB | rgb(55, 103, 143) |
| HSL | hsl(207, 44%, 39%) |
| OKLCH | oklch(49.8% 0.083 245.7) |
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 #37678F | 6.00:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #37678F | 3.49:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #37678F text on white | 6.00:1 | AA | Lc 79.8 | Fine for body text |
| #37678F text on black | 3.49:1 | AA large text | Lc -22.0 | 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
#ACC4D9
oklch(80.9% 0.04 244.7)
-
Step 400
400
#80A5C7
oklch(70.7% 0.064 246.6)
-
Step 500
500
#5E8FB8
oklch(63.2% 0.082 244.8)
-
Step 600
600
#4478A4
oklch(55.6% 0.089 245.8)
-
Step 700
700 (this color)
#37678F
oklch(49.8% 0.083 245.7)
-
Step 800
800
#2D5272
oklch(42.6% 0.068 246.4)
-
Step 900
900
#28445C
oklch(37.6% 0.054 245.7)
-
Step 950
950
#182836
oklch(27% 0.034 245.9)
#37678F 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) | #566891 | 0.037 |
| Deuteranopia (no green cones) | #4A5F8E | 0.029 |
| Tritanopia (no blue cones) | #007175 | 0.066 |
| Achromatopsia (no color) | #636363 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37678F
#37678F
oklch(49.8% 0.083 245.7)
- #83582B
#83582B
oklch(49.8% 0.083 65)
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 #37678F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.012
- Peacock Blue #016795 ΔE 0.030
- Dusky Blue #475F94 ΔE 0.031
- Muted Blue #3B719F ΔE 0.036
- Ocean Blue #03719C ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.041
- Sea Blue #047495 ΔE 0.041
Use #37678F 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.