#579EBB
Closest named color: Greyblue (#77A1B5). oklch(66.4% 0.083 226.7), rgb(87, 158, 187).
Aa
Black text reads best on this color (7.01:1).
About this color
#579EBB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.083 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.036 away. Black text reads best on it, at 7.01:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.01:1 |
| White text | 2.99:1 |
Values
| HEX | #579EBB |
| RGB | rgb(87, 158, 187) |
| HSL | hsl(197, 42%, 54%) |
| OKLCH | oklch(66.4% 0.083 226.7) |
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 #579EBB | 2.99:1 | Fails | Lc -61.8 | Content text, not long reading |
| Black text on #579EBB | 7.01:1 | AAA | Lc 47.6 | Large or bold text, headings |
| #579EBB text on white | 2.99:1 | Fails | Lc 56.4 | Large or bold text, headings |
| #579EBB text on black | 7.01:1 | AAA | Lc -45.3 | 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 500.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE5
oklch(88.6% 0.023 224.9)
-
Step 300
300
#A6C7D5
oklch(81% 0.041 225.4)
-
Step 400
400
#74A9C0
oklch(70.6% 0.065 227)
-
Step 500
500 (this color)
#579EBB
oklch(66.4% 0.083 226.7)
-
Step 600
600
#2B7E9C
oklch(55.7% 0.09 226.2)
-
Step 700
700
#1C6A85
oklch(49.1% 0.084 226.1)
-
Step 800
800
#1B566C
oklch(42.6% 0.069 226.9)
-
Step 900
900
#1D4758
oklch(37.6% 0.055 227.5)
-
Step 950
950
#122A33
oklch(27% 0.034 224.8)
#579EBB 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) | #8F9BBD | 0.064 |
| Deuteranopia (no green cones) | #8090BB | 0.056 |
| Tritanopia (no blue cones) | #0EA7A7 | 0.060 |
| Achromatopsia (no color) | #959595 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #579EBB
#579EBB
oklch(66.4% 0.083 226.7)
- #BE8467
#BE8467
oklch(66.5% 0.083 47.4)
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 #579EBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.036
- Cadet Blue #5F9EA0 ΔE 0.041
- Faded Blue #658CBB ΔE 0.052
- Silver Lake Blue #778DA9 ΔE 0.054
- Blue Grey #758DA3 ΔE 0.055
- Bluegrey #85A3B2 ΔE 0.055
- Turquoise Blue #06B1C4 ΔE 0.057
- Bluey Grey #89A0B0 ΔE 0.057
Use #579EBB 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.