#37707B
Closest named color: Deep Aqua (#08787F). oklch(51.1% 0.062 211.8), rgb(55, 112, 123).
Aa
White text reads best on this color (5.57:1).
About this color
#37707B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.062 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.030 away. White text reads best on it, at 5.57:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #37707B |
| RGB | rgb(55, 112, 123) |
| HSL | hsl(190, 38%, 35%) |
| OKLCH | oklch(51.1% 0.062 211.8) |
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 #37707B | 5.57:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #37707B | 3.76:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #37707B text on white | 5.57:1 | AA | Lc 77.7 | Fine for body text |
| #37707B text on black | 3.76:1 | AA large text | Lc -24.1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CDDCDF
oklch(88.4% 0.017 211)
-
Step 300
300
#ABC6CC
oklch(80.8% 0.03 212.6)
-
Step 400
400
#7EA9B2
oklch(70.7% 0.048 212)
-
Step 500
500
#5C949F
oklch(63.2% 0.061 211.4)
-
Step 600
600
#407E8A
oklch(55.7% 0.066 211.7)
-
Step 700
700 (this color)
#37707B
oklch(51.1% 0.062 211.8)
-
Step 800
800
#2A575F
oklch(42.8% 0.051 210.5)
-
Step 900
900
#27474E
oklch(37.6% 0.04 213.3)
-
Step 950
950
#172A2E
oklch(27.1% 0.026 212.5)
#37707B 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) | #676C7C | 0.058 |
| Deuteranopia (no green cones) | #5D657B | 0.053 |
| Tritanopia (no blue cones) | #007573 | 0.035 |
| Achromatopsia (no color) | #686868 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37707B
#37707B
oklch(51.1% 0.062 211.8)
- #865950
#865950
oklch(51% 0.062 31.8)
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 #37707B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.030
- Deep Turquoise #017374 ΔE 0.032
- Dark Aquamarine #017371 ΔE 0.035
- Bluegreen #017A79 ΔE 0.038
- Slate #516572 ΔE 0.039
- Metallic Blue #4F738E ΔE 0.042
- Ocean #017B92 ΔE 0.043
- Sea Blue #047495 ΔE 0.043
Use #37707B 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.