#5BBBC9
Closest named color: Turquoise Blue (#06B1C4). oklch(73.9% 0.092 208), rgb(91, 187, 201).
Aa
Black text reads best on this color (9.39:1).
About this color
#5BBBC9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.092 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.051 away. Black text reads best on it, at 9.39:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 9.39:1 |
| White text | 2.23:1 |
Values
| HEX | #5BBBC9 |
| RGB | rgb(91, 187, 201) |
| HSL | hsl(188, 50%, 57%) |
| OKLCH | oklch(73.9% 0.092 208) |
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 #5BBBC9 | 2.23:1 | Fails | Lc -48.6 | Large or bold text, headings |
| Black text on #5BBBC9 | 9.39:1 | AAA | Lc 60.1 | Content text, not long reading |
| #5BBBC9 text on white | 2.23:1 | Fails | Lc 43.8 | Non-text elements, placeholder text |
| #5BBBC9 text on black | 9.39:1 | AAA | Lc -58.3 | 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
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DEEDF0
oklch(93.6% 0.016 211)
-
Step 200
200
#C2E0E4
oklch(88.6% 0.032 206.4)
-
Step 300
300
#95CCD4
oklch(81% 0.058 207.3)
-
Step 400
400 (this color)
#5BBBC9
oklch(73.9% 0.092 208)
-
Step 500
500
#009BAC
oklch(63.1% 0.109 208.4)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#5BBBC9 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) | #ADB5CA | 0.089 |
| Deuteranopia (no green cones) | #9CA8C9 | 0.081 |
| Tritanopia (no blue cones) | #00C2BF | 0.044 |
| Achromatopsia (no color) | #ADADAD | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBBC9
#5BBBC9
oklch(73.9% 0.092 208)
- #DF948A
#DF948A
oklch(73.9% 0.093 27.8)
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 #5BBBC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.051
- Dark Turquoise #00CED1 ΔE 0.055
- Topaz #13BBAF ΔE 0.056
- Vivid Sky Blue #4CC9F0 ΔE 0.058
- Medium Turquoise #48D1CC ΔE 0.061
- Light Sea Green #20B2AA ΔE 0.063
- Light Cornflower Blue #98C1D9 ΔE 0.070
- Bluegrey #85A3B2 ΔE 0.071
Use #5BBBC9 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.