#559BAB
Closest named color: Cadet Blue (#5F9EA0). oklch(65% 0.074 214.3), rgb(85, 155, 171).
Aa
Black text reads best on this color (6.66:1).
About this color
#559BAB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.074 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.023 away. Black text reads best on it, at 6.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.66:1 |
| White text | 3.15:1 |
Values
| HEX | #559BAB |
| RGB | rgb(85, 155, 171) |
| HSL | hsl(191, 34%, 50%) |
| OKLCH | oklch(65% 0.074 214.3) |
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 #559BAB | 3.15:1 | AA large text | Lc -63.9 | Content text, not long reading |
| Black text on #559BAB | 6.66:1 | AA | Lc 45.6 | Large or bold text, headings |
| #559BAB text on white | 3.15:1 | AA large text | Lc 58.5 | Large or bold text, headings |
| #559BAB text on black | 6.66:1 | AA | Lc -43.3 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CBDDE1
oklch(88.5% 0.02 212.6)
-
Step 300
300
#A7C7CF
oklch(80.9% 0.036 214.5)
-
Step 400
400
#76AAB7
oklch(70.6% 0.058 215)
-
Step 500
500 (this color)
#559BAB
oklch(65% 0.074 214.3)
-
Step 600
600
#2F7F90
oklch(55.5% 0.08 214.4)
-
Step 700
700
#206B7B
oklch(49% 0.075 215.1)
-
Step 800
800
#1D5864
oklch(42.8% 0.063 213.7)
-
Step 900
900
#1F4851
oklch(37.6% 0.048 214.1)
-
Step 950
950
#132A30
oklch(26.9% 0.031 216.7)
#559BAB 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) | #8F97AC | 0.067 |
| Deuteranopia (no green cones) | #828DAB | 0.061 |
| Tritanopia (no blue cones) | #22A1A0 | 0.042 |
| Achromatopsia (no color) | #919191 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559BAB
#559BAB
oklch(65% 0.074 214.3)
- #B87F71
#B87F71
oklch(65% 0.074 34.3)
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 #559BAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.023
- Greyblue #77A1B5 ΔE 0.044
- Sea #3C9992 ΔE 0.045
- Dull Teal #5F9E8F ΔE 0.046
- Blue Grey #758DA3 ΔE 0.047
- Grey Teal #5E9B8A ΔE 0.050
- Silver Lake Blue #778DA9 ΔE 0.051
- Faded Blue #658CBB ΔE 0.057
Use #559BAB 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.