#558BAC
Closest named color: Dusty Blue (#5A86AD). oklch(61.2% 0.076 236.7), rgb(85, 139, 172).
Aa
Black text reads best on this color (5.67:1).
About this color
#558BAC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.076 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.015 away. Black text reads best on it, at 5.67:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.67:1 |
| White text | 3.70:1 |
Values
| HEX | #558BAC |
| RGB | rgb(85, 139, 172) |
| HSL | hsl(203, 34%, 50%) |
| OKLCH | oklch(61.2% 0.076 236.7) |
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 #558BAC | 3.70:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #558BAC | 5.67:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #558BAC text on white | 3.70:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #558BAC text on black | 5.67:1 | AA | Lc -37.2 | 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
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#ABC5D6
oklch(80.9% 0.037 236.6)
-
Step 400
400
#7DA7C1
oklch(70.7% 0.059 235.9)
-
Step 500
500 (this color)
#558BAC
oklch(61.2% 0.076 236.7)
-
Step 600
600
#3F7A9E
oklch(55.5% 0.083 237.6)
-
Step 700
700
#306787
oklch(49.1% 0.077 236.8)
-
Step 800
800
#29546D
oklch(42.6% 0.063 236.4)
-
Step 900
900
#264659
oklch(37.8% 0.05 236.2)
-
Step 950
950
#172934
oklch(27.1% 0.031 236.4)
#558BAC 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) | #7C8AAE | 0.047 |
| Deuteranopia (no green cones) | #7081AB | 0.039 |
| Tritanopia (no blue cones) | #279496 | 0.060 |
| Achromatopsia (no color) | #858585 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558BAC
#558BAC
oklch(61.2% 0.076 236.7)
- #A77856
#A77856
oklch(61.2% 0.076 56.6)
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 #558BAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.015
- Off Blue #5684AE ΔE 0.021
- Faded Blue #658CBB ΔE 0.030
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.036
- Blue Grey #758DA3 ΔE 0.040
- Silver Lake Blue #778DA9 ΔE 0.041
- Blue NCS #118AB2 ΔE 0.043
Use #558BAC 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.