#37B8DC
Closest named color: Turquoise Blue (#06B1C4). oklch(72.9% 0.119 221), rgb(55, 184, 220).
Aa
Black text reads best on this color (9.05:1).
About this color
#37B8DC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.119 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.042 away. Black text reads best on it, at 9.05:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 9.05:1 |
| White text | 2.31:1 |
Values
| HEX | #37B8DC |
| RGB | rgb(55, 184, 220) |
| HSL | hsl(193, 70%, 54%) |
| OKLCH | oklch(72.9% 0.119 221) |
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 #37B8DC | 2.31:1 | Fails | Lc -50.2 | Large or bold text, headings |
| Black text on #37B8DC | 9.05:1 | AAA | Lc 58.6 | Large or bold text, headings |
| #37B8DC text on white | 2.31:1 | Fails | Lc 45.4 | Large or bold text, headings |
| #37B8DC text on black | 9.05:1 | AAA | Lc -56.7 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF7FA
oklch(97.1% 0.009 222.1)
-
Step 100
100
#DBEEF4
oklch(93.7% 0.022 218.6)
-
Step 200
200
#BCE0ED
oklch(88.5% 0.042 221.7)
-
Step 300
300
#89CCE3
oklch(80.9% 0.075 221.5)
-
Step 400
400 (this color)
#37B8DC
oklch(72.9% 0.119 221)
-
Step 500
500
#0099BA
oklch(63.2% 0.115 220.3)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#00495B
oklch(37.6% 0.069 221.4)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#37B8DC 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) | #A2B3DE | 0.097 |
| Deuteranopia (no green cones) | #8CA3DC | 0.087 |
| Tritanopia (no blue cones) | #00C3C4 | 0.056 |
| Achromatopsia (no color) | #AAAAAA | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B8DC
#37B8DC
oklch(72.9% 0.119 221)
- #E78D6B
#E78D6B
oklch(73% 0.12 41.3)
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 #37B8DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.042
- Deep Sky Blue #00BFFF ΔE 0.050
- Vivid Sky Blue #4CC9F0 ΔE 0.053
- Bright Sky Blue #02CCFE ΔE 0.063
- Dark Turquoise #00CED1 ΔE 0.069
- Topaz #13BBAF ΔE 0.073
- Light Sea Green #20B2AA ΔE 0.075
- Lightblue #7BC8F6 ΔE 0.079
Use #37B8DC 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.