#588D9C
Closest named color: Steel (#738595). oklch(61.2% 0.061 217.7), rgb(88, 141, 156).
Aa
Black text reads best on this color (5.70:1).
About this color
#588D9C is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.061 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Steel (#738595), ΔE 0.036 away. Black text reads best on it, at 5.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Steel (#738595) |
| Black text | 5.70:1 |
| White text | 3.68:1 |
Values
| HEX | #588D9C |
| RGB | rgb(88, 141, 156) |
| HSL | hsl(193, 28%, 48%) |
| OKLCH | oklch(61.2% 0.061 217.7) |
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 #588D9C | 3.68:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #588D9C | 5.70:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #588D9C text on white | 3.68:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #588D9C text on black | 5.70:1 | AA | Lc -37.4 | 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
#CEDCE0
oklch(88.5% 0.016 216.7)
-
Step 300
300
#ACC6CD
oklch(80.9% 0.03 215.8)
-
Step 400
400
#7FA8B4
oklch(70.6% 0.048 217.7)
-
Step 500
500 (this color)
#588D9C
oklch(61.2% 0.061 217.7)
-
Step 600
600
#427D8D
oklch(55.6% 0.066 217.6)
-
Step 700
700
#346978
oklch(49.1% 0.061 218.6)
-
Step 800
800
#2C5661
oklch(42.7% 0.05 216.8)
-
Step 900
900
#284750
oklch(37.8% 0.04 218.4)
-
Step 950
950
#182A2F
oklch(27.2% 0.025 217.2)
#588D9C 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) | #838A9D | 0.053 |
| Deuteranopia (no green cones) | #78829C | 0.047 |
| Tritanopia (no blue cones) | #3A9292 | 0.036 |
| Achromatopsia (no color) | #858585 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588D9C
#588D9C
oklch(61.2% 0.061 217.7)
- #A4776A
#A4776A
oklch(61.1% 0.06 36.7)
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 #588D9C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel #738595 ΔE 0.036
- Blue Grey #758DA3 ΔE 0.037
- Light Slate Gray #778899 ΔE 0.037
- Dusty Blue #5A86AD ΔE 0.038
- Steel Grey #6F828A ΔE 0.040
- Slate Gray #708090 ΔE 0.042
- Dusty Teal #4C9085 ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.044
Use #588D9C 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.