#5BBFDB
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.6% 0.101 218.8), rgb(91, 191, 219).
Aa
Black text reads best on this color (9.92:1).
About this color
#5BBFDB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.101 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.034 away. Black text reads best on it, at 9.92:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.92:1 |
| White text | 2.11:1 |
Values
| HEX | #5BBFDB |
| RGB | rgb(91, 191, 219) |
| HSL | hsl(193, 64%, 61%) |
| OKLCH | oklch(75.6% 0.101 218.8) |
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 #5BBFDB | 2.11:1 | Fails | Lc -45.9 | Large or bold text, headings |
| Black text on #5BBFDB | 9.92:1 | AAA | Lc 62.7 | Content text, not long reading |
| #5BBFDB text on white | 2.11:1 | Fails | Lc 41.3 | Non-text elements, placeholder text |
| #5BBFDB text on black | 9.92:1 | AAA | Lc -61.0 | 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 400.
-
Step 50
50
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DDEDF2
oklch(93.6% 0.018 218.4)
-
Step 200
200
#C1DFE9
oklch(88.5% 0.035 219.9)
-
Step 300
300
#92CBDC
oklch(80.9% 0.063 218.3)
-
Step 400
400 (this color)
#5BBFDB
oklch(75.6% 0.101 218.8)
-
Step 500
500
#0099B8
oklch(63.1% 0.114 219)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586B
oklch(42.5% 0.077 219.1)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#5BBFDB 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) | #ADBADD | 0.086 |
| Deuteranopia (no green cones) | #9AACDB | 0.077 |
| Tritanopia (no blue cones) | #00C9C8 | 0.056 |
| Achromatopsia (no color) | #B2B2B2 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBFDB
#5BBFDB
oklch(75.6% 0.101 218.8)
- #E79980
#E79980
oklch(75.5% 0.101 38.5)
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 #5BBFDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.034
- Lightblue #7BC8F6 ΔE 0.054
- Bright Sky Blue #02CCFE ΔE 0.056
- Dark Turquoise #00CED1 ΔE 0.056
- Deep Sky Blue #00BFFF ΔE 0.059
- Light Cornflower Blue #98C1D9 ΔE 0.060
- Medium Turquoise #48D1CC ΔE 0.062
- Sky Blue #87CEEB ΔE 0.063
Use #5BBFDB 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.