#59ADDF
Closest named color: Turquoise Blue (#06B1C4). oklch(71.5% 0.11 237.2), rgb(89, 173, 223).
Aa
Black text reads best on this color (8.46:1).
About this color
#59ADDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.110 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.061 away. Black text reads best on it, at 8.46:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.46:1 |
| White text | 2.48:1 |
Values
| HEX | #59ADDF |
| RGB | rgb(89, 173, 223) |
| HSL | hsl(202, 68%, 61%) |
| OKLCH | oklch(71.5% 0.11 237.2) |
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 #59ADDF | 2.48:1 | Fails | Lc -53.6 | Large or bold text, headings |
| Black text on #59ADDF | 8.46:1 | AAA | Lc 55.5 | Large or bold text, headings |
| #59ADDF text on white | 2.48:1 | Fails | Lc 48.5 | Large or bold text, headings |
| #59ADDF text on black | 8.46:1 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DEECF6
oklch(93.6% 0.02 238.7)
-
Step 200
200
#C3DEF0
oklch(88.6% 0.038 237.1)
-
Step 300
300
#97C8E8
oklch(80.9% 0.068 237.3)
-
Step 400
400 (this color)
#59ADDF
oklch(71.5% 0.11 237.2)
-
Step 500
500
#0094D2
oklch(63.2% 0.138 237.1)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#012A3F
oklch(27% 0.058 237)
#59ADDF 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) | #96ACE1 | 0.065 |
| Deuteranopia (no green cones) | #839EDE | 0.055 |
| Tritanopia (no blue cones) | #00BABE | 0.079 |
| Achromatopsia (no color) | #A4A4A4 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #59ADDF
#59ADDF
oklch(71.5% 0.11 237.2)
- #D7915C
#D7915C
oklch(71.6% 0.109 57)
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 #59ADDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.061
- Deep Sky Blue #00BFFF ΔE 0.061
- Greyblue #77A1B5 ΔE 0.064
- Bluegrey #85A3B2 ΔE 0.072
- Cornflower Blue #6495ED ΔE 0.073
- Vivid Sky Blue #4CC9F0 ΔE 0.074
- Carolina Blue #8AB8FE ΔE 0.074
- Bluey Grey #89A0B0 ΔE 0.078
Use #59ADDF 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.