#558B9B
Closest named color: Dusty Blue (#5A86AD). oklch(60.5% 0.062 218.7), rgb(85, 139, 155).
Aa
Black text reads best on this color (5.55:1).
About this color
#558B9B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.062 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.036 away. Black text reads best on it, at 5.55:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.55:1 |
| White text | 3.78:1 |
Values
| HEX | #558B9B |
| RGB | rgb(85, 139, 155) |
| HSL | hsl(194, 29%, 47%) |
| OKLCH | oklch(60.5% 0.062 218.7) |
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 #558B9B | 3.78:1 | AA large text | Lc -70.8 | Content text, not long reading |
| Black text on #558B9B | 5.55:1 | AA | Lc 38.8 | Non-text elements, placeholder text |
| #558B9B text on white | 3.78:1 | AA large text | Lc 65.3 | Content text, not long reading |
| #558B9B text on black | 5.55:1 | AA | Lc -36.4 | 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
#CEDCE1
oklch(88.5% 0.017 221.1)
-
Step 300
300
#ACC6CE
oklch(81% 0.03 218.3)
-
Step 400
400
#7FA8B5
oklch(70.6% 0.048 219.3)
-
Step 500
500 (this color)
#558B9B
oklch(60.5% 0.062 218.7)
-
Step 600
600
#417D8E
oklch(55.6% 0.068 218.5)
-
Step 700
700
#326979
oklch(49% 0.063 219.4)
-
Step 800
800
#2B5662
oklch(42.7% 0.052 218.2)
-
Step 900
900
#274750
oklch(37.7% 0.041 217.9)
-
Step 950
950
#182A2F
oklch(27.2% 0.025 217.2)
#558B9B 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) | #81889C | 0.054 |
| Deuteranopia (no green cones) | #76809B | 0.048 |
| Tritanopia (no blue cones) | #359190 | 0.039 |
| Achromatopsia (no color) | #838383 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558B9B
#558B9B
oklch(60.5% 0.062 218.7)
- #A37566
#A37566
oklch(60.5% 0.063 38.8)
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 #558B9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.036
- Steel #738595 ΔE 0.036
- Steel Grey #6F828A ΔE 0.039
- Light Slate Gray #778899 ΔE 0.040
- Slate Gray #708090 ΔE 0.040
- Grey Blue #647D8E ΔE 0.041
- Off Blue #5684AE ΔE 0.041
- Blue Grey #758DA3 ΔE 0.041
Use #558B9B 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.