#588C99
Closest named color: Steel (#738595). oklch(60.8% 0.059 215.4), rgb(88, 140, 153).
Aa
Black text reads best on this color (5.62:1).
About this color
#588C99 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.059 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Steel (#738595), ΔE 0.035 away. Black text reads best on it, at 5.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Steel (#738595) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #588C99 |
| RGB | rgb(88, 140, 153) |
| HSL | hsl(192, 27%, 47%) |
| OKLCH | oklch(60.8% 0.059 215.4) |
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 #588C99 | 3.73:1 | AA large text | Lc -70.3 | Content text, not long reading |
| Black text on #588C99 | 5.62:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #588C99 text on white | 3.73:1 | AA large text | Lc 64.8 | Content text, not long reading |
| #588C99 text on black | 5.62:1 | AA | Lc -36.9 | 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
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CEDCE0
oklch(88.5% 0.016 216.7)
-
Step 300
300
#ADC6CC
oklch(81% 0.028 213.8)
-
Step 400
400
#80A8B3
oklch(70.6% 0.046 216.5)
-
Step 500
500 (this color)
#588C99
oklch(60.8% 0.059 215.4)
-
Step 600
600
#447D8B
oklch(55.6% 0.064 215.5)
-
Step 700
700
#356976
oklch(49% 0.059 216.1)
-
Step 800
800
#2C5660
oklch(42.7% 0.05 215)
-
Step 900
900
#28474E
oklch(37.7% 0.039 213.7)
-
Step 950
950
#182A2E
oklch(27.1% 0.025 213.2)
#588C99 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) | #83899A | 0.054 |
| Deuteranopia (no green cones) | #788199 | 0.048 |
| Tritanopia (no blue cones) | #3C9190 | 0.034 |
| Achromatopsia (no color) | #848484 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588C99
#588C99
oklch(60.8% 0.059 215.4)
- #A3766B
#A3766B
oklch(60.8% 0.059 34.2)
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 #588C99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel #738595 ΔE 0.035
- Steel Grey #6F828A ΔE 0.037
- Light Slate Gray #778899 ΔE 0.038
- Blue Grey #758DA3 ΔE 0.039
- Dusty Teal #4C9085 ΔE 0.039
- Slate Gray #708090 ΔE 0.040
- Dusty Blue #5A86AD ΔE 0.040
- Grey Blue #647D8E ΔE 0.042
Use #588C99 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.