#5377AE
Closest named color: Flat Blue (#3C73A8). oklch(56.6% 0.095 258.6), rgb(83, 119, 174).
Aa
Black text reads best on this color (4.61:1).
About this color
#5377AE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.095 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.030 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #5377AE |
| RGB | rgb(83, 119, 174) |
| HSL | hsl(216, 36%, 50%) |
| OKLCH | oklch(56.6% 0.095 258.6) |
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 #5377AE | 4.54:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #5377AE | 4.61:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #5377AE text on white | 4.54:1 | AA | Lc 71.5 | Content text, not long reading |
| #5377AE text on black | 4.61:1 | AA | Lc -30.2 | 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 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
#B0C2DD
oklch(80.9% 0.043 258.4)
-
Step 400
400
#87A2CC
oklch(70.7% 0.069 259.1)
-
Step 500
500
#698BBE
oklch(63.2% 0.086 258.3)
-
Step 600
600 (this color)
#5377AE
oklch(56.6% 0.095 258.6)
-
Step 700
700
#416193
oklch(49.1% 0.089 259)
-
Step 800
800
#364F77
oklch(42.6% 0.074 259.5)
-
Step 900
900
#2F4260
oklch(37.7% 0.057 259.3)
-
Step 950
950
#1B2738
oklch(27% 0.036 257.1)
#5377AE 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) | #617BB0 | 0.022 |
| Deuteranopia (no green cones) | #5672AD | 0.014 |
| Tritanopia (no blue cones) | #25838B | 0.084 |
| Achromatopsia (no color) | #767676 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5377AE
#5377AE
oklch(56.6% 0.095 258.6)
- #946F2D
#946F2D
oklch(56.6% 0.095 79.1)
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 #5377AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.030
- Steel Blue #4682B4 ΔE 0.031
- Dull Blue #49759C ΔE 0.031
- Stormy Blue #507B9C ΔE 0.034
- Windows Blue #3778BF ΔE 0.035
- Cerulean #457B9D ΔE 0.036
- Cool Blue #4984B8 ΔE 0.036
- Off Blue #5684AE ΔE 0.038
Use #5377AE 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.