#5183DF
Closest named color: Dark Sky Blue (#448EE4). oklch(61.9% 0.15 261.5), rgb(81, 131, 223).
Aa
Black text reads best on this color (5.66:1).
About this color
#5183DF is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.150 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.029 away. Black text reads best on it, at 5.66:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.66:1 |
| White text | 3.70:1 |
Values
| HEX | #5183DF |
| RGB | rgb(81, 131, 223) |
| HSL | hsl(219, 69%, 60%) |
| OKLCH | oklch(61.9% 0.15 261.5) |
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 #5183DF | 3.70:1 | AA large text | Lc -69.9 | Content text, not long reading |
| Black text on #5183DF | 5.66:1 | AA | Lc 39.7 | Non-text elements, placeholder text |
| #5183DF text on white | 3.70:1 | AA large text | Lc 64.4 | Content text, not long reading |
| #5183DF text on black | 5.66:1 | AA | Lc -37.3 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A7C2F1
oklch(81% 0.073 261.4)
-
Step 400
400
#77A0EA
oklch(70.7% 0.118 261.7)
-
Step 500
500 (this color)
#5183DF
oklch(61.9% 0.15 261.5)
-
Step 600
600
#3A6ED1
oklch(55.6% 0.163 261.8)
-
Step 700
700
#2C5CB5
oklch(49.2% 0.151 261.4)
-
Step 800
800
#254B92
oklch(42.6% 0.125 261.5)
-
Step 900
900
#234075
oklch(37.8% 0.097 261.4)
-
Step 950
950
#152644
oklch(27.1% 0.061 261)
#5183DF 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) | #598CE3 | 0.027 |
| Deuteranopia (no green cones) | #447FDD | 0.018 |
| Tritanopia (no blue cones) | #0098A6 | 0.125 |
| Achromatopsia (no color) | #858585 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5183DF
#5183DF
oklch(61.9% 0.15 261.5)
- #AC7C00
#AC7C00
oklch(61.8% 0.128 81.3)
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 #5183DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.029
- Soft Blue #6488EA ΔE 0.030
- Chefchaouen Blue #4895EF ΔE 0.049
- Water Blue #0E87CC ΔE 0.052
- Cornflower #6A79F7 ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.056
- Dodger Blue #1E90FF ΔE 0.058
- Windows Blue #3778BF ΔE 0.062
Use #5183DF 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.