#37BCE5
Closest named color: Deep Sky Blue (#00BFFF). oklch(74.2% 0.125 223.4), rgb(55, 188, 229).
Aa
Black text reads best on this color (9.48:1).
About this color
#37BCE5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.125 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.037 away. Black text reads best on it, at 9.48:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.48:1 |
| White text | 2.21:1 |
Values
| HEX | #37BCE5 |
| RGB | rgb(55, 188, 229) |
| HSL | hsl(194, 77%, 56%) |
| OKLCH | oklch(74.2% 0.125 223.4) |
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 #37BCE5 | 2.21:1 | Fails | Lc -47.9 | Large or bold text, headings |
| Black text on #37BCE5 | 9.48:1 | AAA | Lc 60.8 | Content text, not long reading |
| #37BCE5 text on white | 2.21:1 | Fails | Lc 43.2 | Non-text elements, placeholder text |
| #37BCE5 text on black | 9.48:1 | AAA | Lc -59.0 | 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
#EEF7FB
oklch(97.1% 0.011 226)
-
Step 100
100
#DBEEF5
oklch(93.7% 0.022 221.8)
-
Step 200
200
#BBE0EE
oklch(88.5% 0.043 222.8)
-
Step 300
300
#87CCE6
oklch(80.9% 0.078 223.8)
-
Step 400
400 (this color)
#37BCE5
oklch(74.2% 0.125 223.4)
-
Step 500
500
#0098BD
oklch(63.1% 0.118 223.1)
-
Step 600
600
#0080A0
oklch(55.7% 0.104 223.4)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#002B38
oklch(26.8% 0.05 223.6)
#37BCE5 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) | #A5B8E7 | 0.098 |
| Deuteranopia (no green cones) | #8DA7E5 | 0.086 |
| Tritanopia (no blue cones) | #00C8C9 | 0.063 |
| Achromatopsia (no color) | #AEAEAE | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37BCE5
#37BCE5
oklch(74.2% 0.125 223.4)
- #ED9069
#ED9069
oklch(74.2% 0.125 43.2)
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 #37BCE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.037
- Vivid Sky Blue #4CC9F0 ΔE 0.040
- Bright Sky Blue #02CCFE ΔE 0.048
- Turquoise Blue #06B1C4 ΔE 0.057
- Dark Turquoise #00CED1 ΔE 0.067
- Lightblue #7BC8F6 ΔE 0.067
- Aqua Blue #02D8E9 ΔE 0.076
- Sky #82CAFC ΔE 0.079
Use #37BCE5 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.