#5188CA
Closest named color: Cool Blue (#4984B8). oklch(61.8% 0.116 254), rgb(81, 136, 202).
Aa
Black text reads best on this color (5.72:1).
About this color
#5188CA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.116 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.030 away. Black text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.72:1 |
| White text | 3.66:1 |
Values
| HEX | #5188CA |
| RGB | rgb(81, 136, 202) |
| HSL | hsl(213, 53%, 55%) |
| OKLCH | oklch(61.8% 0.116 254) |
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 #5188CA | 3.66:1 | AA large text | Lc -69.6 | Content text, not long reading |
| Black text on #5188CA | 5.72:1 | AA | Lc 40.0 | Non-text elements, placeholder text |
| #5188CA text on white | 3.66:1 | AA large text | Lc 64.1 | Content text, not long reading |
| #5188CA text on black | 5.72:1 | AA | Lc -37.6 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CBDBEE
oklch(88.5% 0.031 252.7)
-
Step 300
300
#A8C3E5
oklch(80.9% 0.057 254.3)
-
Step 400
400
#78A4D9
oklch(70.8% 0.092 253.6)
-
Step 500
500 (this color)
#5188CA
oklch(61.8% 0.116 254)
-
Step 600
600
#3975BB
oklch(55.6% 0.126 253.9)
-
Step 700
700
#2B62A1
oklch(49.1% 0.117 253.8)
-
Step 800
800
#255083
oklch(42.7% 0.098 254.3)
-
Step 900
900
#234369
oklch(37.8% 0.076 253.9)
-
Step 950
950
#15273D
oklch(26.9% 0.048 254.2)
#5188CA 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) | #6C8CCD | 0.033 |
| Deuteranopia (no green cones) | #5C80C9 | 0.023 |
| Tritanopia (no blue cones) | #0097A0 | 0.097 |
| Achromatopsia (no color) | #858585 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5188CA
#5188CA
oklch(61.8% 0.116 254)
- #AF7A26
#AF7A26
oklch(61.9% 0.116 74.2)
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 #5188CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.030
- Faded Blue #658CBB ΔE 0.035
- Steel Blue #4682B4 ΔE 0.038
- Dark Sky Blue #448EE4 ΔE 0.040
- Water Blue #0E87CC ΔE 0.040
- Off Blue #5684AE ΔE 0.042
- Dusty Blue #5A86AD ΔE 0.044
- Soft Blue #6488EA ΔE 0.054
Use #5188CA 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.