#558CA3
Closest named color: Dusty Blue (#5A86AD). oklch(61.1% 0.068 226.7), rgb(85, 140, 163).
Aa
Black text reads best on this color (5.66:1).
About this color
#558CA3 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.068 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.027 away. Black text reads best on it, at 5.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.66:1 |
| White text | 3.70:1 |
Values
| HEX | #558CA3 |
| RGB | rgb(85, 140, 163) |
| HSL | hsl(198, 31%, 49%) |
| OKLCH | oklch(61.1% 0.068 226.7) |
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 #558CA3 | 3.70:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #558CA3 | 5.66:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #558CA3 text on white | 3.70:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #558CA3 text on black | 5.66:1 | AA | Lc -37.1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE3
oklch(88.5% 0.019 227.3)
-
Step 300
300
#ABC5D1
oklch(80.8% 0.033 227.3)
-
Step 400
400
#7EA8BA
oklch(70.7% 0.052 226.2)
-
Step 500
500 (this color)
#558CA3
oklch(61.1% 0.068 226.7)
-
Step 600
600
#3F7C95
oklch(55.6% 0.074 227.1)
-
Step 700
700
#31697F
oklch(49.2% 0.068 226.4)
-
Step 800
800
#295567
oklch(42.6% 0.057 227.1)
-
Step 900
900
#264654
oklch(37.6% 0.045 228.1)
-
Step 950
950
#172931
oklch(26.9% 0.028 227.9)
#558CA3 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) | #808AA4 | 0.052 |
| Deuteranopia (no green cones) | #7481A3 | 0.046 |
| Tritanopia (no blue cones) | #2F9393 | 0.048 |
| Achromatopsia (no color) | #858585 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558CA3
#558CA3
oklch(61.1% 0.068 226.7)
- #A67761
#A67761
oklch(61.1% 0.068 46.1)
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 #558CA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.027
- Off Blue #5684AE ΔE 0.033
- Blue Grey #758DA3 ΔE 0.038
- Steel #738595 ΔE 0.039
- Light Slate Gray #778899 ΔE 0.040
- Silver Lake Blue #778DA9 ΔE 0.042
- Faded Blue #658CBB ΔE 0.043
- Slate Gray #708090 ΔE 0.045
Use #558CA3 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.