#579F99
Closest named color: Cadet Blue (#5F9EA0). oklch(65.4% 0.073 188.6), rgb(87, 159, 153).
Aa
Black text reads best on this color (6.82:1).
About this color
#579F99 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.073 and its hue 189°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.015 away. Black text reads best on it, at 6.82:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.82:1 |
| White text | 3.07:1 |
Values
| HEX | #579F99 |
| RGB | rgb(87, 159, 153) |
| HSL | hsl(175, 29%, 48%) |
| OKLCH | oklch(65.4% 0.073 188.6) |
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 #579F99 | 3.07:1 | AA large text | Lc -62.9 | Content text, not long reading |
| Black text on #579F99 | 6.82:1 | AA | Lc 46.5 | Large or bold text, headings |
| #579F99 text on white | 3.07:1 | AA large text | Lc 57.5 | Large or bold text, headings |
| #579F99 text on black | 6.82:1 | AA | Lc -44.2 | 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
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CBDEDB
oklch(88.6% 0.021 185.4)
-
Step 300
300
#A7C8C5
oklch(80.8% 0.036 189.7)
-
Step 400
400
#77ADA7
oklch(70.8% 0.058 187.3)
-
Step 500
500 (this color)
#579F99
oklch(65.4% 0.073 188.6)
-
Step 600
600
#2F827C
oklch(55.5% 0.08 188.4)
-
Step 700
700
#206E69
oklch(49.1% 0.074 188.8)
-
Step 800
800
#1E5A55
oklch(42.8% 0.062 187.4)
-
Step 900
900
#1F4A46
oklch(37.7% 0.048 187.2)
-
Step 950
950
#132B29
oklch(26.9% 0.03 188.5)
#579F99 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) | #989899 | 0.078 |
| Deuteranopia (no green cones) | #8C8F9A | 0.074 |
| Tritanopia (no blue cones) | #35A29D | 0.024 |
| Achromatopsia (no color) | #939393 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #579F99
#579F99
oklch(65.4% 0.073 188.6)
- #B87E87
#B87E87
oklch(65.4% 0.073 9.1)
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 #579F99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.015
- Dull Teal #5F9E8F ΔE 0.015
- Grey Teal #5E9B8A ΔE 0.021
- Sea #3C9992 ΔE 0.031
- Persian Green #2A9D8F ΔE 0.038
- Blue Green #0F9B8E ΔE 0.048
- Dusty Teal #4C9085 ΔE 0.049
- Light Sea Green #20B2AA ΔE 0.055
Use #579F99 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.