#5BC9EA
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(78.5% 0.11 220.6), rgb(91, 201, 234).
Aa
Black text reads best on this color (10.98:1).
About this color
#5BC9EA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.110 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.012 away. Black text reads best on it, at 10.98:1.
| Hue family | Teals and cyans |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.98:1 |
| White text | 1.91:1 |
Values
| HEX | #5BC9EA |
| RGB | rgb(91, 201, 234) |
| HSL | hsl(194, 77%, 64%) |
| OKLCH | oklch(78.5% 0.11 220.6) |
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 #5BC9EA | 1.91:1 | Fails | Lc -40.5 | Non-text elements, placeholder text |
| Black text on #5BC9EA | 10.98:1 | AAA | Lc 67.7 | Content text, not long reading |
| #5BC9EA text on white | 1.91:1 | Fails | Lc 36.2 | Non-text elements, placeholder text |
| #5BC9EA text on black | 10.98:1 | AAA | Lc -66.3 | Content text, not long reading |
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 300.
-
Step 50
50
#EBF8FC
oklch(97.1% 0.015 218)
-
Step 100
100
#D4EFF9
oklch(93.6% 0.031 222.1)
-
Step 200
200
#ADE3F6
oklch(88.5% 0.061 221.5)
-
Step 300
300 (this color)
#5BC9EA
oklch(78.5% 0.11 220.6)
-
Step 400
400
#00B2D9
oklch(70.7% 0.13 221)
-
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
#004A5B
oklch(37.8% 0.069 219.8)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#5BC9EA 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) | #B5C4EC | 0.092 |
| Deuteranopia (no green cones) | #A0B5EA | 0.081 |
| Tritanopia (no blue cones) | #00D4D3 | 0.061 |
| Achromatopsia (no color) | #BBBBBB | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BC9EA
#5BC9EA
oklch(78.5% 0.11 220.6)
- #F5A082
#F5A082
oklch(78.4% 0.11 40.2)
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 #5BC9EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.012
- Lightblue #7BC8F6 ΔE 0.034
- Bright Sky Blue #02CCFE ΔE 0.038
- Sky Blue #87CEEB ΔE 0.042
- Sky #82CAFC ΔE 0.045
- Aqua Blue #02D8E9 ΔE 0.048
- Light Sky Blue #87CEFA ΔE 0.049
- Dark Turquoise #00CED1 ΔE 0.056
Use #5BC9EA 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.