#579CBB
Closest named color: Greyblue (#77A1B5). oklch(66% 0.084 229), rgb(87, 156, 187).
Aa
Black text reads best on this color (6.87:1).
About this color
#579CBB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.084 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.039 away. Black text reads best on it, at 6.87:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 6.87:1 |
| White text | 3.05:1 |
Values
| HEX | #579CBB |
| RGB | rgb(87, 156, 187) |
| HSL | hsl(199, 42%, 54%) |
| OKLCH | oklch(66% 0.084 229) |
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 #579CBB | 3.05:1 | AA large text | Lc -62.6 | Content text, not long reading |
| Black text on #579CBB | 6.87:1 | AA | Lc 46.8 | Large or bold text, headings |
| #579CBB text on white | 3.05:1 | AA large text | Lc 57.2 | Large or bold text, headings |
| #579CBB text on black | 6.87:1 | AA | Lc -44.5 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CBDCE5
oklch(88.4% 0.022 230.6)
-
Step 300
300
#A6C6D6
oklch(80.8% 0.041 229.5)
-
Step 400
400
#75A9C1
oklch(70.7% 0.065 228.5)
-
Step 500
500 (this color)
#579CBB
oklch(66% 0.084 229)
-
Step 600
600
#2D7D9E
oklch(55.6% 0.091 229.3)
-
Step 700
700
#1F6987
oklch(49% 0.085 229.6)
-
Step 800
800
#1D566D
oklch(42.7% 0.069 228.6)
-
Step 900
900
#1E4759
oklch(37.7% 0.055 229.4)
-
Step 950
950
#132A34
oklch(27.1% 0.034 228.3)
#579CBB 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) | #8C9ABD | 0.060 |
| Deuteranopia (no green cones) | #7E8FBB | 0.053 |
| Tritanopia (no blue cones) | #10A5A6 | 0.061 |
| Achromatopsia (no color) | #939393 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #579CBB
#579CBB
oklch(66% 0.084 229)
- #BC8364
#BC8364
oklch(66% 0.083 49.4)
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 #579CBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.039
- Cadet Blue #5F9EA0 ΔE 0.043
- Faded Blue #658CBB ΔE 0.046
- Silver Lake Blue #778DA9 ΔE 0.050
- Blue Grey #758DA3 ΔE 0.052
- Bluegrey #85A3B2 ΔE 0.058
- Bluey Grey #89A0B0 ΔE 0.060
- Dusty Blue #5A86AD ΔE 0.061
Use #579CBB 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.