#37747C
Closest named color: Deep Aqua (#08787F). oklch(52.2% 0.064 206.7), rgb(55, 116, 124).
Aa
White text reads best on this color (5.31:1).
About this color
#37747C is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.064 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.024 away. White text reads best on it, at 5.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.95:1 |
| White text | 5.31:1 |
Values
| HEX | #37747C |
| RGB | rgb(55, 116, 124) |
| HSL | hsl(187, 39%, 35%) |
| OKLCH | oklch(52.2% 0.064 206.7) |
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 #37747C | 5.31:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #37747C | 3.95:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #37747C text on white | 5.31:1 | AA | Lc 76.3 | Fine for body text |
| #37747C text on black | 3.95:1 | AA large text | Lc -25.5 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CDDDDF
oklch(88.6% 0.017 205.8)
-
Step 300
300
#AAC7CB
oklch(80.9% 0.032 206.7)
-
Step 400
400
#7CAAB0
oklch(70.7% 0.05 206.2)
-
Step 500
500
#59959D
oklch(63.2% 0.063 206.6)
-
Step 600
600
#3C7F88
oklch(55.7% 0.069 207)
-
Step 700
700 (this color)
#37747C
oklch(52.2% 0.064 206.7)
-
Step 800
800
#27575E
oklch(42.6% 0.053 208)
-
Step 900
900
#25484D
oklch(37.7% 0.041 207.5)
-
Step 950
950
#162A2D
oklch(26.9% 0.026 207.9)
#37747C 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) | #6B707D | 0.062 |
| Deuteranopia (no green cones) | #61687C | 0.057 |
| Tritanopia (no blue cones) | #007876 | 0.031 |
| Achromatopsia (no color) | #6B6B6B | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37747C
#37747C
oklch(52.2% 0.064 206.7)
- #8B5B56
#8B5B56
oklch(52.2% 0.064 26)
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 #37747C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.024
- Bluegreen #017A79 ΔE 0.031
- Deep Turquoise #017374 ΔE 0.032
- Dark Aquamarine #017371 ΔE 0.035
- Ocean #017B92 ΔE 0.038
- Teal #008080 ΔE 0.039
- Metallic Blue #4F738E ΔE 0.041
- Sea Blue #047495 ΔE 0.045
Use #37747C 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.