#59B1BB
Closest named color: Turquoise Blue (#06B1C4). oklch(71% 0.086 205.2), rgb(89, 177, 187).
Aa
Black text reads best on this color (8.43:1).
About this color
#59B1BB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.086 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.037 away. Black text reads best on it, at 8.43:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.43:1 |
| White text | 2.49:1 |
Values
| HEX | #59B1BB |
| RGB | rgb(89, 177, 187) |
| HSL | hsl(186, 42%, 54%) |
| OKLCH | oklch(71% 0.086 205.2) |
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 #59B1BB | 2.49:1 | Fails | Lc -53.8 | Large or bold text, headings |
| Black text on #59B1BB | 8.43:1 | AAA | Lc 55.3 | Large or bold text, headings |
| #59B1BB text on white | 2.49:1 | Fails | Lc 48.7 | Large or bold text, headings |
| #59B1BB text on black | 8.43:1 | AAA | Lc -53.2 | 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
#C3DFE2
oklch(88.4% 0.03 204.5)
-
Step 300
300
#98CBD1
oklch(80.9% 0.054 205.2)
-
Step 400
400 (this color)
#59B1BB
oklch(71% 0.086 205.2)
-
Step 500
500
#009CA9
oklch(63.2% 0.108 205.2)
-
Step 600
600
#00838E
oklch(55.7% 0.095 205.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A62
oklch(42.7% 0.073 205.3)
-
Step 900
900
#004B52
oklch(37.7% 0.064 205.5)
-
Step 950
950
#012D31
oklch(27.1% 0.046 204.2)
#59B1BB 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) | #A5ABBC | 0.085 |
| Deuteranopia (no green cones) | #959FBB | 0.078 |
| Tritanopia (no blue cones) | #09B7B4 | 0.041 |
| Achromatopsia (no color) | #A4A4A4 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #59B1BB
#59B1BB
oklch(71% 0.086 205.2)
- #D28D86
#D28D86
oklch(71.1% 0.085 25.8)
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 #59B1BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.037
- Light Sea Green #20B2AA ΔE 0.044
- Greyblue #77A1B5 ΔE 0.048
- Topaz #13BBAF ΔE 0.050
- Bluegrey #85A3B2 ΔE 0.053
- Cadet Blue #5F9EA0 ΔE 0.057
- Bluey Grey #89A0B0 ΔE 0.062
- Greeny Blue #42B395 ΔE 0.063
Use #59B1BB 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.