#5578AA
Closest named color: Stormy Blue (#507B9C). oklch(56.8% 0.088 257.3), rgb(85, 120, 170).
Aa
Black text reads best on this color (4.65:1).
About this color
#5578AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.088 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.027 away. Black text reads best on it, at 4.65:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.65:1 |
| White text | 4.51:1 |
Values
| HEX | #5578AA |
| RGB | rgb(85, 120, 170) |
| HSL | hsl(215, 33%, 50%) |
| OKLCH | oklch(56.8% 0.088 257.3) |
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 #5578AA | 4.51:1 | AA | Lc -76.7 | Fine for body text |
| Black text on #5578AA | 4.65:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #5578AA text on white | 4.51:1 | AA | Lc 71.2 | Content text, not long reading |
| #5578AA text on black | 4.65:1 | AA | Lc -30.4 | 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 600.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B1C2DB
oklch(80.9% 0.04 257.9)
-
Step 400
400
#88A2C8
oklch(70.6% 0.063 257.8)
-
Step 500
500
#6A8BBA
oklch(63.1% 0.081 257.2)
-
Step 600
600 (this color)
#5578AA
oklch(56.8% 0.088 257.3)
-
Step 700
700
#42628F
oklch(49.2% 0.082 257)
-
Step 800
800
#375074
oklch(42.8% 0.068 257.5)
-
Step 900
900
#2F425D
oklch(37.5% 0.053 257.2)
-
Step 950
950
#1C2737
oklch(27% 0.034 257.7)
#5578AA 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) | #657BAC | 0.023 |
| Deuteranopia (no green cones) | #5A73A9 | 0.014 |
| Tritanopia (no blue cones) | #2E838A | 0.077 |
| Achromatopsia (no color) | #767676 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5578AA
#5578AA
oklch(56.8% 0.088 257.3)
- #937036
#937036
oklch(56.8% 0.087 78.1)
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 #5578AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.027
- Dull Blue #49759C ΔE 0.027
- Steel Blue #4682B4 ΔE 0.030
- Cerulean #457B9D ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.032
- Off Blue #5684AE ΔE 0.034
- Cool Blue #4984B8 ΔE 0.036
- Muted Blue #3B719F ΔE 0.040
Use #5578AA 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.