#5188E8
Closest named color: Dark Sky Blue (#448EE4). oklch(63.5% 0.156 260.7), rgb(81, 136, 232).
Aa
Black text reads best on this color (6.03:1).
About this color
#5188E8 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.156 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.020 away. Black text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.03:1 |
| White text | 3.47:1 |
Values
| HEX | #5188E8 |
| RGB | rgb(81, 136, 232) |
| HSL | hsl(218, 77%, 61%) |
| OKLCH | oklch(63.5% 0.156 260.7) |
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 #5188E8 | 3.47:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #5188E8 | 6.03:1 | AA | Lc 42.0 | Non-text elements, placeholder text |
| #5188E8 text on white | 3.47:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #5188E8 text on black | 6.03:1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#C9DAF6
oklch(88.4% 0.043 260.4)
-
Step 300
300
#A5C2F3
oklch(81% 0.077 260.8)
-
Step 400
400
#74A0EC
oklch(70.6% 0.122 260.9)
-
Step 500
500 (this color)
#5188E8
oklch(63.5% 0.156 260.7)
-
Step 600
600
#346ED5
oklch(55.6% 0.17 260.9)
-
Step 700
700
#265BB8
oklch(49% 0.158 260.7)
-
Step 800
800
#214B95
oklch(42.6% 0.131 260.8)
-
Step 900
900
#203F77
oklch(37.6% 0.103 261.2)
-
Step 950
950
#132646
oklch(27.1% 0.065 260.2)
#5188E8 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) | #5C91EC | 0.028 |
| Deuteranopia (no green cones) | #4483E6 | 0.019 |
| Tritanopia (no blue cones) | #009EAD | 0.128 |
| Achromatopsia (no color) | #898989 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5188E8
#5188E8
oklch(63.5% 0.156 260.7)
- #B38000
#B38000
oklch(63.4% 0.131 80.5)
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 #5188E8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.020
- Soft Blue #6488EA ΔE 0.020
- Chefchaouen Blue #4895EF ΔE 0.034
- Cornflower Blue #6495ED ΔE 0.042
- Dodger Blue #1E90FF ΔE 0.044
- Cornflower #6A79F7 ΔE 0.052
- Water Blue #0E87CC ΔE 0.061
- Clear Blue #247AFD ΔE 0.063
Use #5188E8 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.