#5188CD
Closest named color: Cool Blue (#4984B8). oklch(62% 0.12 254.9), rgb(81, 136, 205).
Aa
Black text reads best on this color (5.75:1).
About this color
#5188CD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.120 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.034 away. Black text reads best on it, at 5.75:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.75:1 |
| White text | 3.65:1 |
Values
| HEX | #5188CD |
| RGB | rgb(81, 136, 205) |
| HSL | hsl(213, 55%, 56%) |
| OKLCH | oklch(62% 0.12 254.9) |
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 #5188CD | 3.65:1 | AA large text | Lc -69.4 | Content text, not long reading |
| Black text on #5188CD | 5.75:1 | AA | Lc 40.2 | Non-text elements, placeholder text |
| #5188CD text on white | 3.65:1 | AA large text | Lc 63.9 | Content text, not long reading |
| #5188CD text on black | 5.75:1 | AA | Lc -37.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A7C3E7
oklch(80.9% 0.06 254.8)
-
Step 400
400
#78A3DB
oklch(70.6% 0.095 255.3)
-
Step 500
500 (this color)
#5188CD
oklch(62% 0.12 254.9)
-
Step 600
600
#3874BE
oklch(55.6% 0.131 255.1)
-
Step 700
700
#2A61A4
oklch(49.1% 0.122 255.1)
-
Step 800
800
#245085
oklch(42.8% 0.101 254.6)
-
Step 900
900
#22426A
oklch(37.5% 0.079 255)
-
Step 950
950
#15273E
oklch(27% 0.049 255.2)
#5188CD 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) | #6B8CD0 | 0.032 |
| Deuteranopia (no green cones) | #5A80CC | 0.022 |
| Tritanopia (no blue cones) | #0098A1 | 0.101 |
| Achromatopsia (no color) | #868686 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5188CD
#5188CD
oklch(62% 0.12 254.9)
- #B07A1F
#B07A1F
oklch(62% 0.12 74.9)
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 #5188CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.035
- Faded Blue #658CBB ΔE 0.038
- Water Blue #0E87CC ΔE 0.040
- Steel Blue #4682B4 ΔE 0.042
- Off Blue #5684AE ΔE 0.046
- Dusty Blue #5A86AD ΔE 0.048
- Soft Blue #6488EA ΔE 0.050
Use #5188CD 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.