#5BB1BE
Closest named color: Turquoise Blue (#06B1C4). oklch(71.2% 0.085 208.3), rgb(91, 177, 190).
Aa
Black text reads best on this color (8.47:1).
About this color
#5BB1BE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.085 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.038 away. Black text reads best on it, at 8.47:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.47:1 |
| White text | 2.47:1 |
Values
| HEX | #5BB1BE |
| RGB | rgb(91, 177, 190) |
| HSL | hsl(188, 43%, 55%) |
| OKLCH | oklch(71.2% 0.085 208.3) |
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 #5BB1BE | 2.47:1 | Fails | Lc -53.5 | Large or bold text, headings |
| Black text on #5BB1BE | 8.47:1 | AAA | Lc 55.5 | Large or bold text, headings |
| #5BB1BE text on white | 2.47:1 | Fails | Lc 48.5 | Large or bold text, headings |
| #5BB1BE text on black | 8.47:1 | AAA | Lc -53.5 | 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
#DFEDEF
oklch(93.6% 0.015 207.1)
-
Step 200
200
#C4DFE3
oklch(88.5% 0.029 207.4)
-
Step 300
300
#99CBD3
oklch(81% 0.053 208.3)
-
Step 400
400 (this color)
#5BB1BE
oklch(71.2% 0.085 208.3)
-
Step 500
500
#009BAC
oklch(63.1% 0.109 208.4)
-
Step 600
600
#008291
oklch(55.5% 0.096 208.9)
-
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
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#022C32
oklch(26.9% 0.045 209.3)
#5BB1BE 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) | #A4ABBF | 0.082 |
| Deuteranopia (no green cones) | #95A0BE | 0.075 |
| Tritanopia (no blue cones) | #11B8B5 | 0.044 |
| Achromatopsia (no color) | #A5A5A5 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BB1BE
#5BB1BE
oklch(71.2% 0.085 208.3)
- #D28E84
#D28E84
oklch(71.2% 0.085 28.6)
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 #5BB1BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.038
- Greyblue #77A1B5 ΔE 0.047
- Light Sea Green #20B2AA ΔE 0.049
- Bluegrey #85A3B2 ΔE 0.052
- Topaz #13BBAF ΔE 0.054
- Cadet Blue #5F9EA0 ΔE 0.059
- Bluey Grey #89A0B0 ΔE 0.060
- Cool Steel #97A7B3 ΔE 0.065
Use #5BB1BE 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.