#37748C
Closest named color: Metallic Blue (#4F738E). oklch(52.9% 0.073 226.5), rgb(55, 116, 140).
Aa
White text reads best on this color (5.19:1).
About this color
#37748C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.073 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.025 away. White text reads best on it, at 5.19:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.03:1 |
| White text | 5.19:1 |
Values
| HEX | #37748C |
| RGB | rgb(55, 116, 140) |
| HSL | hsl(197, 44%, 38%) |
| OKLCH | oklch(52.9% 0.073 226.5) |
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 #37748C | 5.19:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #37748C | 4.03:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #37748C text on white | 5.19:1 | AA | Lc 75.6 | Fine for body text |
| #37748C text on black | 4.03:1 | AA large text | Lc -26.1 | 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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE3
oklch(88.5% 0.019 227.3)
-
Step 300
300
#ABC5D1
oklch(80.8% 0.033 227.3)
-
Step 400
400
#7EA8BA
oklch(70.7% 0.052 226.2)
-
Step 500
500
#5B92A9
oklch(63.1% 0.068 226.5)
-
Step 600
600 (this color)
#37748C
oklch(52.9% 0.073 226.5)
-
Step 700
700
#31697E
oklch(49.2% 0.067 225.3)
-
Step 800
800
#295567
oklch(42.6% 0.057 227.1)
-
Step 900
900
#264654
oklch(37.6% 0.045 228.1)
-
Step 950
950
#172931
oklch(26.9% 0.028 227.9)
#37748C 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) | #67728D | 0.055 |
| Deuteranopia (no green cones) | #5B698C | 0.048 |
| Tritanopia (no blue cones) | #007B7C | 0.046 |
| Achromatopsia (no color) | #6D6D6D | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37748C
#37748C
oklch(52.9% 0.073 226.5)
- #8F5E46
#8F5E46
oklch(52.9% 0.074 46.8)
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 #37748C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.025
- Sea Blue #047495 ΔE 0.027
- Ocean #017B92 ΔE 0.028
- Dull Blue #49759C ΔE 0.033
- Muted Blue #3B719F ΔE 0.035
- Cerulean #457B9D ΔE 0.035
- Deep Aqua #08787F ΔE 0.037
- Ocean Blue #03719C ΔE 0.038
Use #37748C 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.