#559EAF
Closest named color: Cadet Blue (#5F9EA0). oklch(65.8% 0.077 214.7), rgb(85, 158, 175).
Aa
Black text reads best on this color (6.89:1).
About this color
#559EAF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.077 and its hue 215°. 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 6.89:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.89:1 |
| White text | 3.04:1 |
Values
| HEX | #559EAF |
| RGB | rgb(85, 158, 175) |
| HSL | hsl(191, 36%, 51%) |
| OKLCH | oklch(65.8% 0.077 214.7) |
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 #559EAF | 3.04:1 | AA large text | Lc -62.5 | Content text, not long reading |
| Black text on #559EAF | 6.89:1 | AA | Lc 46.9 | Large or bold text, headings |
| #559EAF text on white | 3.04:1 | AA large text | Lc 57.1 | Large or bold text, headings |
| #559EAF text on black | 6.89:1 | AA | Lc -44.6 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE2
oklch(88.5% 0.022 215.3)
-
Step 300
300
#A6C7D0
oklch(80.8% 0.038 216.1)
-
Step 400
400
#74ABB8
oklch(70.8% 0.061 214.1)
-
Step 500
500 (this color)
#559EAF
oklch(65.8% 0.077 214.7)
-
Step 600
600
#2A8092
oklch(55.7% 0.084 214.5)
-
Step 700
700
#1B6C7C
oklch(49.2% 0.078 214.2)
-
Step 800
800
#1A5865
oklch(42.8% 0.065 214.6)
-
Step 900
900
#1D4852
oklch(37.6% 0.05 215.3)
-
Step 950
950
#122A30
oklch(26.8% 0.032 216)
#559EAF 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) | #929AB0 | 0.070 |
| Deuteranopia (no green cones) | #848FAF | 0.064 |
| Tritanopia (no blue cones) | #1BA5A3 | 0.046 |
| Achromatopsia (no color) | #949494 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559EAF
#559EAF
oklch(65.8% 0.077 214.7)
- #BC8172
#BC8172
oklch(65.9% 0.077 34.9)
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 #559EAF, 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 0.039
- Dull Teal #5F9E8F ΔE 0.048
- Sea #3C9992 ΔE 0.051
- Blue Grey #758DA3 ΔE 0.053
- Grey Teal #5E9B8A ΔE 0.053
- Silver Lake Blue #778DA9 ΔE 0.055
- Bluegrey #85A3B2 ΔE 0.056
Use #559EAF 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.