#5BBBCC
Closest named color: Turquoise Blue (#06B1C4). oklch(74.1% 0.093 210.6), rgb(91, 187, 204).
Aa
Black text reads best on this color (9.42:1).
About this color
#5BBBCC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.093 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.052 away. Black text reads best on it, at 9.42:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 9.42:1 |
| White text | 2.22:1 |
Values
| HEX | #5BBBCC |
| RGB | rgb(91, 187, 204) |
| HSL | hsl(189, 53%, 58%) |
| OKLCH | oklch(74.1% 0.093 210.6) |
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 #5BBBCC | 2.22:1 | Fails | Lc -48.5 | Large or bold text, headings |
| Black text on #5BBBCC | 9.42:1 | AAA | Lc 60.3 | Content text, not long reading |
| #5BBBCC text on white | 2.22:1 | Fails | Lc 43.7 | Non-text elements, placeholder text |
| #5BBBCC text on black | 9.42:1 | AAA | Lc -58.5 | 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
#C2DFE5
oklch(88.4% 0.032 211.6)
-
Step 300
300
#95CBD6
oklch(80.8% 0.058 211.6)
-
Step 400
400 (this color)
#5BBBCC
oklch(74.1% 0.093 210.6)
-
Step 500
500
#009BAE
oklch(63.2% 0.109 210)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#5BBBCC 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) | #ADB5CD | 0.089 |
| Deuteranopia (no green cones) | #9BA8CC | 0.080 |
| Tritanopia (no blue cones) | #00C3C0 | 0.047 |
| Achromatopsia (no color) | #AEAEAE | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBBCC
#5BBBCC
oklch(74.1% 0.093 210.6)
- #E09587
#E09587
oklch(74.1% 0.094 31)
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 #5BBBCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.052
- Vivid Sky Blue #4CC9F0 ΔE 0.055
- Dark Turquoise #00CED1 ΔE 0.056
- Topaz #13BBAF ΔE 0.059
- Medium Turquoise #48D1CC ΔE 0.062
- Light Sea Green #20B2AA ΔE 0.066
- Light Cornflower Blue #98C1D9 ΔE 0.068
- Light Grey Blue #9DBCD4 ΔE 0.070
Use #5BBBCC 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.