#578FBB
Closest named color: Faded Blue (#658CBB). oklch(62.9% 0.089 243.6), rgb(87, 143, 187).
Aa
Black text reads best on this color (6.05:1).
About this color
#578FBB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.089 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.016 away. Black text reads best on it, at 6.05:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.05:1 |
| White text | 3.47:1 |
Values
| HEX | #578FBB |
| RGB | rgb(87, 143, 187) |
| HSL | hsl(206, 42%, 54%) |
| OKLCH | oklch(62.9% 0.089 243.6) |
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 #578FBB | 3.47:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #578FBB | 6.05:1 | AA | Lc 42.0 | Non-text elements, placeholder text |
| #578FBB text on white | 3.47:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #578FBB text on black | 6.05:1 | AA | Lc -39.6 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE8
oklch(88.4% 0.024 244.2)
-
Step 300
300
#A9C4DB
oklch(80.8% 0.044 244)
-
Step 400
400
#7BA6C9
oklch(70.7% 0.069 243.5)
-
Step 500
500 (this color)
#578FBB
oklch(62.9% 0.089 243.6)
-
Step 600
600
#3B79A8
oklch(55.6% 0.097 243.8)
-
Step 700
700
#2D6690
oklch(49.2% 0.09 243.5)
-
Step 800
800
#265375
oklch(42.7% 0.075 243.8)
-
Step 900
900
#24455E
oklch(37.7% 0.058 243)
-
Step 950
950
#162837
oklch(26.9% 0.037 244.9)
#578FBB 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) | #7C8FBD | 0.043 |
| Deuteranopia (no green cones) | #6F85BA | 0.036 |
| Tritanopia (no blue cones) | #199A9E | 0.075 |
| Achromatopsia (no color) | #8A8A8A | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578FBB
#578FBB
oklch(62.9% 0.089 243.6)
- #AF7D4D
#AF7D4D
oklch(62.9% 0.089 63.8)
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 #578FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.016
- Dusty Blue #5A86AD ΔE 0.029
- Off Blue #5684AE ΔE 0.033
- Cool Blue #4984B8 ΔE 0.036
- Silver Lake Blue #778DA9 ΔE 0.042
- Steel Blue #4682B4 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.046
- Blue NCS #118AB2 ΔE 0.051
Use #578FBB 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.