#5BF4EF
Closest named color: Bright Light Blue (#26F7FD). oklch(88.6% 0.128 192), rgb(91, 244, 239).
Aa
Black text reads best on this color (15.63:1).
About this color
#5BF4EF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 89%, its chroma 0.128 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Light Blue (#26F7FD), ΔE 0.024 away. Black text reads best on it, at 15.63:1.
| Hue family | Teals and cyans |
| Lightness | light (89%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Bright Light Blue (#26F7FD) |
| Black text | 15.63:1 |
| White text | 1.34:1 |
Values
| HEX | #5BF4EF |
| RGB | rgb(91, 244, 239) |
| HSL | hsl(178, 87%, 66%) |
| OKLCH | oklch(88.6% 0.128 192) |
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 #5BF4EF | 1.34:1 | Fails | Lc -19.0 | Dividers and decoration only |
| Black text on #5BF4EF | 15.63:1 | AAA | Lc 87.1 | Fine for body text |
| #5BF4EF text on white | 1.34:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #5BF4EF text on black | 15.63:1 | AAA | Lc -87.1 | Fine for body text |
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 200.
-
Step 50
50
#E6FBF9
oklch(97.2% 0.022 189.9)
-
Step 100
100
#C6F5F2
oklch(93.7% 0.048 191.6)
-
Step 200
200 (this color)
#5BF4EF
oklch(88.6% 0.128 192)
-
Step 300
300
#00DCD8
oklch(80.9% 0.139 192.4)
-
Step 400
400
#00B8B4
oklch(70.7% 0.121 192)
-
Step 500
500
#009E9A
oklch(63.2% 0.109 191.6)
-
Step 600
600
#008582
oklch(55.7% 0.096 192)
-
Step 700
700
#006F6D
oklch(49% 0.084 192.6)
-
Step 800
800
#005B59
oklch(42.6% 0.073 192.2)
-
Step 900
900
#004C4A
oklch(37.6% 0.065 191.7)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#5BF4EF 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) | #E6E8EF | 0.135 |
| Deuteranopia (no green cones) | #CED7F0 | 0.126 |
| Tritanopia (no blue cones) | #00FBF2 | 0.027 |
| Achromatopsia (no color) | #DEDEDE | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BF4EF
#5BF4EF
oklch(88.6% 0.128 192)
- #FFC9CF
#FFC9CF
oklch(88.5% 0.062 10.9)
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 #5BF4EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Light Blue #26F7FD ΔE 0.024
- Bright Cyan #41FDFE ΔE 0.026
- Bright Aqua #0BF9EA ΔE 0.029
- Bright Turquoise #0FFEF9 ΔE 0.030
- Robin's Egg #6DEDFD ΔE 0.034
- Cyan #00FFFF ΔE 0.034
- Robin Egg Blue #8AF1FE ΔE 0.043
- Light Turquoise #7EF4CC ΔE 0.050
Use #5BF4EF 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.