#558AAD
Closest named color: Dusty Blue (#5A86AD). oklch(61% 0.078 238.8), rgb(85, 138, 173).
Aa
Black text reads best on this color (5.62:1).
About this color
#558AAD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.078 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.012 away. Black text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #558AAD |
| RGB | rgb(85, 138, 173) |
| HSL | hsl(204, 35%, 51%) |
| OKLCH | oklch(61% 0.078 238.8) |
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 #558AAD | 3.73:1 | AA large text | Lc -70.3 | Content text, not long reading |
| Black text on #558AAD | 5.62:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #558AAD text on white | 3.73:1 | AA large text | Lc 64.8 | Content text, not long reading |
| #558AAD text on black | 5.62:1 | AA | Lc -36.9 | 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
#CDDBE6
oklch(88.4% 0.021 241.4)
-
Step 300
300
#ABC5D7
oklch(81% 0.038 238.2)
-
Step 400
400
#7DA6C3
oklch(70.6% 0.062 239.5)
-
Step 500
500 (this color)
#558AAD
oklch(61% 0.078 238.8)
-
Step 600
600
#3F7A9F
oklch(55.6% 0.084 238.4)
-
Step 700
700
#316788
oklch(49.2% 0.078 238)
-
Step 800
800
#2A546F
oklch(42.8% 0.065 239)
-
Step 900
900
#26455A
oklch(37.6% 0.052 239.7)
-
Step 950
950
#172934
oklch(27.1% 0.031 236.4)
#558AAD 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) | #7A89AF | 0.044 |
| Deuteranopia (no green cones) | #6E80AC | 0.038 |
| Tritanopia (no blue cones) | #279396 | 0.062 |
| Achromatopsia (no color) | #848484 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558AAD
#558AAD
oklch(61% 0.078 238.8)
- #A67853
#A67853
oklch(61% 0.077 59.5)
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 #558AAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.012
- Off Blue #5684AE ΔE 0.018
- Faded Blue #658CBB ΔE 0.029
- Cool Blue #4984B8 ΔE 0.030
- Steel Blue #4682B4 ΔE 0.033
- Blue Grey #758DA3 ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.042
- Blue NCS #118AB2 ΔE 0.043
Use #558AAD 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.