#5181DF
Closest named color: Soft Blue (#6488EA). oklch(61.5% 0.152 262.4), rgb(81, 129, 223).
Aa
Black text reads best on this color (5.55:1).
About this color
#5181DF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.152 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.033 away. Black text reads best on it, at 5.55:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.55:1 |
| White text | 3.78:1 |
Values
| HEX | #5181DF |
| RGB | rgb(81, 129, 223) |
| HSL | hsl(220, 69%, 60%) |
| OKLCH | oklch(61.5% 0.152 262.4) |
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 #5181DF | 3.78:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #5181DF | 5.55:1 | AA | Lc 39.0 | Non-text elements, placeholder text |
| #5181DF text on white | 3.78:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #5181DF text on black | 5.55:1 | AA | Lc -36.6 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A7C1F1
oklch(80.8% 0.074 262.5)
-
Step 400
400
#78A0EB
oklch(70.8% 0.119 262.3)
-
Step 500
500 (this color)
#5181DF
oklch(61.5% 0.152 262.4)
-
Step 600
600
#3B6DD2
oklch(55.5% 0.165 262.5)
-
Step 700
700
#2E5BB6
oklch(49.1% 0.153 262.4)
-
Step 800
800
#264B94
oklch(42.8% 0.128 262.2)
-
Step 900
900
#243F76
oklch(37.7% 0.1 262.9)
-
Step 950
950
#152545
oklch(26.9% 0.064 262.8)
#5181DF 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) | #568AE3 | 0.025 |
| Deuteranopia (no green cones) | #407DDD | 0.021 |
| Tritanopia (no blue cones) | #0096A5 | 0.126 |
| Achromatopsia (no color) | #838383 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5181DF
#5181DF
oklch(61.5% 0.152 262.4)
- #AA7C00
#AA7C00
oklch(61.6% 0.127 82.4)
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 #5181DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.034
- Cornflower #6A79F7 ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.054
- Water Blue #0E87CC ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.060
- Windows Blue #3778BF ΔE 0.060
- Cornflower Blue #6495ED ΔE 0.061
Use #5181DF 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.