#588E9F
Closest named color: Blue Grey (#758DA3). oklch(61.6% 0.063 220), rgb(88, 142, 159).
Aa
Black text reads best on this color (5.78:1).
About this color
#588E9F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 62%, its chroma 0.063 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.035 away. Black text reads best on it, at 5.78:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 5.78:1 |
| White text | 3.63:1 |
Values
| HEX | #588E9F |
| RGB | rgb(88, 142, 159) |
| HSL | hsl(194, 29%, 48%) |
| OKLCH | oklch(61.6% 0.063 220) |
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 #588E9F | 3.63:1 | AA large text | Lc -69.3 | Content text, not long reading |
| Black text on #588E9F | 5.78:1 | AA | Lc 40.3 | Non-text elements, placeholder text |
| #588E9F text on white | 3.63:1 | AA large text | Lc 63.8 | Content text, not long reading |
| #588E9F text on black | 5.78:1 | AA | Lc -37.9 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE1
oklch(88.5% 0.017 221.1)
-
Step 300
300
#ACC6CE
oklch(81% 0.03 218.3)
-
Step 400
400
#7FA8B6
oklch(70.7% 0.049 220.9)
-
Step 500
500 (this color)
#588E9F
oklch(61.6% 0.063 220)
-
Step 600
600
#417D8F
oklch(55.7% 0.068 219.7)
-
Step 700
700
#32697A
oklch(49.1% 0.064 220.7)
-
Step 800
800
#2B5663
oklch(42.8% 0.052 219.9)
-
Step 900
900
#274751
oklch(37.8% 0.041 220.1)
-
Step 950
950
#18292F
oklch(26.9% 0.025 222.2)
#588E9F 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) | #838BA0 | 0.053 |
| Deuteranopia (no green cones) | #79839F | 0.048 |
| Tritanopia (no blue cones) | #389493 | 0.040 |
| Achromatopsia (no color) | #868686 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588E9F
#588E9F
oklch(61.6% 0.063 220)
- #A67868
#A67868
oklch(61.5% 0.063 40)
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 #588E9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.035
- Dusty Blue #5A86AD ΔE 0.037
- Steel #738595 ΔE 0.037
- Light Slate Gray #778899 ΔE 0.038
- Silver Lake Blue #778DA9 ΔE 0.041
- Off Blue #5684AE ΔE 0.043
- Steel Grey #6F828A ΔE 0.043
- Slate Gray #708090 ΔE 0.045
Use #588E9F 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.