#558799
Closest named color: Grey Blue (#647D8E). oklch(59.5% 0.06 222.9), rgb(85, 135, 153).
Aa
Black text reads best on this color (5.31:1).
About this color
#558799 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 59%, its chroma 0.060 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.031 away. Black text reads best on it, at 5.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.31:1 |
| White text | 3.95:1 |
Values
| HEX | #558799 |
| RGB | rgb(85, 135, 153) |
| HSL | hsl(196, 29%, 47%) |
| OKLCH | oklch(59.5% 0.06 222.9) |
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 #558799 | 3.95:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #558799 | 5.31:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #558799 text on white | 3.95:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #558799 text on black | 5.31:1 | AA | Lc -34.8 | 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 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
#ADC5CF
oklch(80.9% 0.03 224.8)
-
Step 400
400
#81A8B6
oklch(70.8% 0.047 221.9)
-
Step 500
500 (this color)
#558799
oklch(59.5% 0.06 222.9)
-
Step 600
600
#457C8F
oklch(55.6% 0.065 222.5)
-
Step 700
700
#36687A
oklch(49% 0.061 223.7)
-
Step 800
800
#2D5563
oklch(42.6% 0.051 222.9)
-
Step 900
900
#294651
oklch(37.6% 0.04 224.2)
-
Step 950
950
#19292F
oklch(26.9% 0.024 223.4)
#558799 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) | #7D849A | 0.050 |
| Deuteranopia (no green cones) | #727D99 | 0.043 |
| Tritanopia (no blue cones) | #378D8D | 0.040 |
| Achromatopsia (no color) | #808080 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558799
#558799
oklch(59.5% 0.06 222.9)
- #9E7362
#9E7362
oklch(59.4% 0.06 42.5)
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 #558799, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.033
- Steel Grey #6F828A ΔE 0.035
- Slate Gray #708090 ΔE 0.035
- Steel #738595 ΔE 0.035
- Off Blue #5684AE ΔE 0.037
- Stormy Blue #507B9C ΔE 0.039
- Battleship Grey #6B7C85 ΔE 0.041
Use #558799 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.