#559999
Closest named color: Cadet Blue (#5F9EA0). oklch(63.8% 0.069 195.6), rgb(85, 153, 153).
Aa
Black text reads best on this color (6.40:1).
About this color
#559999 is a medium-light, muted teal or cyan. In OKLCH its lightness is 64%, its chroma 0.069 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.020 away. Black text reads best on it, at 6.40:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.40:1 |
| White text | 3.27:1 |
Values
| HEX | #559999 |
| RGB | rgb(85, 153, 153) |
| HSL | hsl(180, 29%, 47%) |
| OKLCH | oklch(63.8% 0.069 195.6) |
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 #559999 | 3.27:1 | AA large text | Lc -65.5 | Content text, not long reading |
| Black text on #559999 | 6.40:1 | AA | Lc 44.1 | Non-text elements, placeholder text |
| #559999 text on white | 3.27:1 | AA large text | Lc 60.0 | Content text, not long reading |
| #559999 text on black | 6.40:1 | AA | Lc -41.7 | 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
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDD
oklch(88.5% 0.018 196.8)
-
Step 300
300
#A8C8C7
oklch(80.9% 0.034 194.2)
-
Step 400
400
#78ACAB
oklch(70.8% 0.055 194.5)
-
Step 500
500 (this color)
#559999
oklch(63.8% 0.069 195.6)
-
Step 600
600
#338181
oklch(55.6% 0.076 195.2)
-
Step 700
700
#256D6D
oklch(49.1% 0.07 195.1)
-
Step 800
800
#215959
oklch(42.7% 0.058 195.2)
-
Step 900
900
#214949
oklch(37.7% 0.045 195.4)
-
Step 950
950
#142B2B
oklch(27% 0.029 195.6)
#559999 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) | #919399 | 0.072 |
| Deuteranopia (no green cones) | #858A9A | 0.068 |
| Tritanopia (no blue cones) | #339D99 | 0.026 |
| Achromatopsia (no color) | #8E8E8E | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559999
#559999
oklch(63.8% 0.069 195.6)
- #B27B7E
#B27B7E
oklch(63.9% 0.069 15.6)
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 #559999, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.020
- Sea #3C9992 ΔE 0.024
- Grey Teal #5E9B8A ΔE 0.026
- Dull Teal #5F9E8F ΔE 0.026
- Dusty Teal #4C9085 ΔE 0.037
- Persian Green #2A9D8F ΔE 0.038
- Blue Green #0F9B8E ΔE 0.045
- Teal Green #0A9396 ΔE 0.048
Use #559999 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.