#5BBFBB
Closest named color: Topaz (#13BBAF). oklch(74.4% 0.094 191.8), rgb(91, 191, 187).
Aa
Black text reads best on this color (9.61:1).
About this color
#5BBFBB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.094 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.043 away. Black text reads best on it, at 9.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.61:1 |
| White text | 2.18:1 |
Values
| HEX | #5BBFBB |
| RGB | rgb(91, 191, 187) |
| HSL | hsl(178, 44%, 55%) |
| OKLCH | oklch(74.4% 0.094 191.8) |
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 #5BBFBB | 2.18:1 | Fails | Lc -47.5 | Large or bold text, headings |
| Black text on #5BBFBB | 9.61:1 | AAA | Lc 61.2 | Content text, not long reading |
| #5BBFBB text on white | 2.18:1 | Fails | Lc 42.8 | Non-text elements, placeholder text |
| #5BBFBB text on black | 9.61:1 | AAA | Lc -59.4 | 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
#F0F7F7
oklch(97.1% 0.007 197)
-
Step 100
100
#DEEEED
oklch(93.7% 0.017 192.3)
-
Step 200
200
#C2E0DE
oklch(88.4% 0.032 191.7)
-
Step 300
300
#94CDCA
oklch(80.8% 0.059 192)
-
Step 400
400 (this color)
#5BBFBB
oklch(74.4% 0.094 191.8)
-
Step 500
500
#009E9A
oklch(63.2% 0.109 191.6)
-
Step 600
600
#008581
oklch(55.7% 0.096 191.1)
-
Step 700
700
#00706D
oklch(49.2% 0.085 191.5)
-
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)
#5BBFBB 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) | #B5B7BB | 0.099 |
| Deuteranopia (no green cones) | #A4AABC | 0.093 |
| Tritanopia (no blue cones) | #08C4BD | 0.034 |
| Achromatopsia (no color) | #AFAFAF | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBFBB
#5BBFBB
oklch(74.4% 0.094 191.8)
- #E0939C
#E0939C
oklch(74.3% 0.094 11.9)
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 #5BBFBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.043
- Dark Turquoise #00CED1 ΔE 0.048
- Medium Turquoise #48D1CC ΔE 0.048
- Medium Aquamarine #66CDAA ΔE 0.054
- Pale Teal #82CBB2 ΔE 0.055
- Light Sea Green #20B2AA ΔE 0.057
- Seafoam Blue #78D1B6 ΔE 0.062
- Turquoise Blue #06B1C4 ΔE 0.062
Use #5BBFBB 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.