#5BBBB4
Closest named color: Topaz (#13BBAF). oklch(73.2% 0.091 189), rgb(91, 187, 180).
Aa
Black text reads best on this color (9.21:1).
About this color
#5BBBB4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.091 and its hue 189°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.036 away. Black text reads best on it, at 9.21:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.21:1 |
| White text | 2.27:1 |
Values
| HEX | #5BBBB4 |
| RGB | rgb(91, 187, 180) |
| HSL | hsl(176, 41%, 55%) |
| OKLCH | oklch(73.2% 0.091 189) |
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 #5BBBB4 | 2.27:1 | Fails | Lc -49.6 | Large or bold text, headings |
| Black text on #5BBBB4 | 9.21:1 | AAA | Lc 59.2 | Large or bold text, headings |
| #5BBBB4 text on white | 2.27:1 | Fails | Lc 44.8 | Non-text elements, placeholder text |
| #5BBBB4 text on black | 9.21:1 | AAA | Lc -57.4 | 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
#F0F7F6
oklch(97.1% 0.008 186.9)
-
Step 100
100
#DEEEEC
oklch(93.7% 0.017 187.9)
-
Step 200
200
#C2E0DD
oklch(88.4% 0.032 189.2)
-
Step 300
300
#96CDC8
oklch(80.9% 0.057 189.1)
-
Step 400
400 (this color)
#5BBBB4
oklch(73.2% 0.091 189)
-
Step 500
500
#009E97
oklch(63.1% 0.109 189.2)
-
Step 600
600
#00857F
oklch(55.6% 0.096 189.2)
-
Step 700
700
#00706A
oklch(49.1% 0.085 188.3)
-
Step 800
800
#005C57
oklch(42.8% 0.074 188.4)
-
Step 900
900
#004C49
oklch(37.6% 0.065 190.2)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#5BBBB4 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) | #B2B3B4 | 0.097 |
| Deuteranopia (no green cones) | #A2A7B5 | 0.091 |
| Tritanopia (no blue cones) | #1CBFB9 | 0.030 |
| Achromatopsia (no color) | #ACACAC | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBBB4
#5BBBB4
oklch(73.2% 0.091 189)
- #DB909C
#DB909C
oklch(73.2% 0.092 9.1)
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 #5BBBB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.036
- Light Sea Green #20B2AA ΔE 0.047
- Greeny Blue #42B395 ΔE 0.052
- Turquoise Blue #06B1C4 ΔE 0.057
- Dark Turquoise #00CED1 ΔE 0.058
- Medium Aquamarine #66CDAA ΔE 0.060
- Medium Turquoise #48D1CC ΔE 0.060
- Muted Teal #90B494 ΔE 0.061
Use #5BBBB4 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.