#5388BB
Closest named color: Cool Blue (#4984B8). oklch(61.1% 0.096 248.8), rgb(83, 136, 187).
Aa
Black text reads best on this color (5.60:1).
About this color
#5388BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.096 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.016 away. Black text reads best on it, at 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.60:1 |
| White text | 3.74:1 |
Values
| HEX | #5388BB |
| RGB | rgb(83, 136, 187) |
| HSL | hsl(209, 43%, 53%) |
| OKLCH | oklch(61.1% 0.096 248.8) |
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 #5388BB | 3.74:1 | AA large text | Lc -70.4 | Content text, not long reading |
| Black text on #5388BB | 5.60:1 | AA | Lc 39.2 | Non-text elements, placeholder text |
| #5388BB text on white | 3.74:1 | AA large text | Lc 64.9 | Content text, not long reading |
| #5388BB text on black | 5.60:1 | AA | Lc -36.8 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEA
oklch(88.5% 0.026 248.1)
-
Step 300
300
#AAC4DE
oklch(80.9% 0.046 248.4)
-
Step 400
400
#7CA5CE
oklch(70.7% 0.075 248.9)
-
Step 500
500 (this color)
#5388BB
oklch(61.1% 0.096 248.8)
-
Step 600
600
#3D77AE
oklch(55.5% 0.105 249.1)
-
Step 700
700
#2F6495
oklch(49.1% 0.097 248.8)
-
Step 800
800
#285279
oklch(42.7% 0.08 248.7)
-
Step 900
900
#254462
oklch(37.7% 0.064 249.1)
-
Step 950
950
#162839
oklch(27% 0.04 248.2)
#5388BB 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) | #738ABD | 0.038 |
| Deuteranopia (no green cones) | #657FBA | 0.030 |
| Tritanopia (no blue cones) | #03949A | 0.083 |
| Achromatopsia (no color) | #848484 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5388BB
#5388BB
oklch(61.1% 0.096 248.8)
- #A9783F
#A9783F
oklch(61.1% 0.096 68.4)
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 #5388BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.016
- Off Blue #5684AE ΔE 0.020
- Dusty Blue #5A86AD ΔE 0.021
- Faded Blue #658CBB ΔE 0.024
- Steel Blue #4682B4 ΔE 0.024
- Blue NCS #118AB2 ΔE 0.045
- Water Blue #0E87CC ΔE 0.048
- Silver Lake Blue #778DA9 ΔE 0.054
Use #5388BB 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.