#559C90
Closest named color: Grey Teal (#5E9B8A). oklch(64.3% 0.074 181.7), rgb(85, 156, 144).
Aa
Black text reads best on this color (6.54:1).
About this color
#559C90 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.074 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Teal (#5E9B8A), ΔE 0.011 away. Black text reads best on it, at 6.54:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Grey Teal (#5E9B8A) |
| Black text | 6.54:1 |
| White text | 3.20:1 |
Values
| HEX | #559C90 |
| RGB | rgb(85, 156, 144) |
| HSL | hsl(170, 29%, 47%) |
| OKLCH | oklch(64.3% 0.074 181.7) |
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 #559C90 | 3.20:1 | AA large text | Lc -64.6 | Content text, not long reading |
| Black text on #559C90 | 6.54:1 | AA | Lc 44.9 | Non-text elements, placeholder text |
| #559C90 text on white | 3.20:1 | AA large text | Lc 59.2 | Large or bold text, headings |
| #559C90 text on black | 6.54:1 | AA | Lc -42.6 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CBDEDA
oklch(88.5% 0.021 181.8)
-
Step 300
300
#A8C9C2
oklch(81% 0.037 181.1)
-
Step 400
400
#78ADA3
oklch(70.8% 0.058 181.5)
-
Step 500
500 (this color)
#559C90
oklch(64.3% 0.074 181.7)
-
Step 600
600
#318377
oklch(55.7% 0.081 182)
-
Step 700
700
#236F64
oklch(49.3% 0.075 181.7)
-
Step 800
800
#1F5A51
oklch(42.7% 0.062 181.4)
-
Step 900
900
#204A43
oklch(37.7% 0.049 181.2)
-
Step 950
950
#142B27
oklch(26.9% 0.03 181.4)
#559C90 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) | #969590 | 0.079 |
| Deuteranopia (no green cones) | #8A8C91 | 0.074 |
| Tritanopia (no blue cones) | #379E98 | 0.023 |
| Achromatopsia (no color) | #909090 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559C90
#559C90
oklch(64.3% 0.074 181.7)
- #B37A8A
#B37A8A
oklch(64.2% 0.074 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 #559C90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Teal #5E9B8A ΔE 0.011
- Dull Teal #5F9E8F ΔE 0.012
- Sea #3C9992 ΔE 0.023
- Cadet Blue #5F9EA0 ΔE 0.027
- Persian Green #2A9D8F ΔE 0.030
- Dusty Teal #4C9085 ΔE 0.038
- Blue Green #0F9B8E ΔE 0.040
- Ocean Green #3D9973 ΔE 0.049
Use #559C90 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.