#5278AC
Closest named color: Dull Blue (#49759C). oklch(56.7% 0.092 256.5), rgb(82, 120, 172).
Aa
Black text reads best on this color (4.64:1).
About this color
#5278AC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.092 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.028 away. Black text reads best on it, at 4.64:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.64:1 |
| White text | 4.52:1 |
Values
| HEX | #5278AC |
| RGB | rgb(82, 120, 172) |
| HSL | hsl(215, 35%, 50%) |
| OKLCH | oklch(56.7% 0.092 256.5) |
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 #5278AC | 4.52:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #5278AC | 4.64:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #5278AC text on white | 4.52:1 | AA | Lc 71.3 | Content text, not long reading |
| #5278AC text on black | 4.64:1 | 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
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B0C2DC
oklch(80.9% 0.042 257.5)
-
Step 400
400
#86A3CA
oklch(70.8% 0.066 255.9)
-
Step 500
500
#688BBC
oklch(63% 0.084 256.9)
-
Step 600
600 (this color)
#5278AC
oklch(56.7% 0.092 256.5)
-
Step 700
700
#406291
oklch(49.2% 0.086 256.7)
-
Step 800
800
#355075
oklch(42.7% 0.07 256.5)
-
Step 900
900
#2E435F
oklch(37.8% 0.055 255.9)
-
Step 950
950
#1B2737
oklch(26.9% 0.034 255.8)
#5278AC 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) | #637BAE | 0.023 |
| Deuteranopia (no green cones) | #5872AB | 0.017 |
| Tritanopia (no blue cones) | #24848A | 0.083 |
| Achromatopsia (no color) | #767676 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5278AC
#5278AC
oklch(56.7% 0.092 256.5)
- #956F32
#956F32
oklch(56.8% 0.092 76.8)
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 #5278AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.028
- Steel Blue #4682B4 ΔE 0.029
- Flat Blue #3C73A8 ΔE 0.029
- Stormy Blue #507B9C ΔE 0.029
- Cerulean #457B9D ΔE 0.031
- Cool Blue #4984B8 ΔE 0.034
- Off Blue #5684AE ΔE 0.035
- Windows Blue #3778BF ΔE 0.038
Use #5278AC 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.