#558591
Closest named color: Grey Blue (#647D8E). oklch(58.7% 0.055 215.3), rgb(85, 133, 145).
Aa
Black text reads best on this color (5.15:1).
About this color
#558591 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 59%, its chroma 0.055 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.027 away. Black text reads best on it, at 5.15:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #558591 |
| RGB | rgb(85, 133, 145) |
| HSL | hsl(192, 26%, 45%) |
| OKLCH | oklch(58.7% 0.055 215.3) |
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 #558591 | 4.07:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #558591 | 5.15:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #558591 text on white | 4.07:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #558591 text on black | 5.15:1 | AA | Lc -33.8 | 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 600.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DCDF
oklch(88.6% 0.014 214.4)
-
Step 300
300
#B0C5CB
oklch(80.9% 0.024 216.8)
-
Step 400
400
#85A7B0
oklch(70.6% 0.039 215.7)
-
Step 500
500
#66929D
oklch(63.2% 0.051 215)
-
Step 600
600 (this color)
#558591
oklch(58.7% 0.055 215.3)
-
Step 700
700
#3D6873
oklch(49% 0.051 215.9)
-
Step 800
800
#33555E
oklch(42.7% 0.042 216.4)
-
Step 900
900
#2D464D
oklch(37.7% 0.033 217.2)
-
Step 950
950
#1B292D
oklch(27% 0.02 217.4)
#558591 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) | #7C8292 | 0.049 |
| Deuteranopia (no green cones) | #737B91 | 0.045 |
| Tritanopia (no blue cones) | #3C8A89 | 0.032 |
| Achromatopsia (no color) | #7E7E7E | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558591
#558591
oklch(58.7% 0.055 215.3)
- #9A7166
#9A7166
oklch(58.7% 0.055 35.6)
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 #558591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.027
- Steel Grey #6F828A ΔE 0.031
- Slate Gray #708090 ΔE 0.034
- Battleship Grey #6B7C85 ΔE 0.034
- Steel #738595 ΔE 0.038
- Stormy Blue #507B9C ΔE 0.040
- Dusty Teal #4C9085 ΔE 0.044
- Cerulean #457B9D ΔE 0.044
Use #558591 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.