#588E9B
Closest named color: Steel (#738595). oklch(61.4% 0.06 214.7), rgb(88, 142, 155).
Aa
Black text reads best on this color (5.75:1).
About this color
#588E9B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.060 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Steel (#738595), ΔE 0.037 away. Black text reads best on it, at 5.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Steel (#738595) |
| Black text | 5.75:1 |
| White text | 3.64:1 |
Values
| HEX | #588E9B |
| RGB | rgb(88, 142, 155) |
| HSL | hsl(192, 28%, 48%) |
| OKLCH | oklch(61.4% 0.06 214.7) |
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 #588E9B | 3.64:1 | AA large text | Lc -69.5 | Content text, not long reading |
| Black text on #588E9B | 5.75:1 | AA | Lc 40.1 | Non-text elements, placeholder text |
| #588E9B text on white | 3.64:1 | AA large text | Lc 64.0 | Content text, not long reading |
| #588E9B text on black | 5.75:1 | AA | Lc -37.7 | 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
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CEDCE0
oklch(88.5% 0.016 216.7)
-
Step 300
300
#ACC6CC
oklch(80.9% 0.029 213.2)
-
Step 400
400
#7FA9B3
oklch(70.8% 0.048 214)
-
Step 500
500 (this color)
#588E9B
oklch(61.4% 0.06 214.7)
-
Step 600
600
#417D8B
oklch(55.5% 0.066 214.8)
-
Step 700
700
#336A76
oklch(49.2% 0.061 213.8)
-
Step 800
800
#2B5660
oklch(42.7% 0.05 214.7)
-
Step 900
900
#28474F
oklch(37.7% 0.039 216.1)
-
Step 950
950
#182A2E
oklch(27.1% 0.025 213.2)
#588E9B 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) | #848B9C | 0.054 |
| Deuteranopia (no green cones) | #7A829B | 0.051 |
| Tritanopia (no blue cones) | #3B9392 | 0.034 |
| Achromatopsia (no color) | #868686 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588E9B
#588E9B
oklch(61.4% 0.06 214.7)
- #A5786C
#A5786C
oklch(61.4% 0.06 35.5)
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 #588E9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel #738595 ΔE 0.037
- Blue Grey #758DA3 ΔE 0.038
- Light Slate Gray #778899 ΔE 0.038
- Dusty Teal #4C9085 ΔE 0.040
- Steel Grey #6F828A ΔE 0.041
- Dusty Blue #5A86AD ΔE 0.042
- Slate Gray #708090 ΔE 0.044
- Sea #3C9992 ΔE 0.045
Use #588E9B 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.