#538EDE
Closest named color: Dark Sky Blue (#448EE4). oklch(64.3% 0.136 256.5), rgb(83, 142, 222).
Aa
Black text reads best on this color (6.29:1).
About this color
#538EDE is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.136 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.015 away. Black text reads best on it, at 6.29:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.29:1 |
| White text | 3.33:1 |
Values
| HEX | #538EDE |
| RGB | rgb(83, 142, 222) |
| HSL | hsl(215, 68%, 60%) |
| OKLCH | oklch(64.3% 0.136 256.5) |
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 #538EDE | 3.33:1 | AA large text | Lc -66.0 | Content text, not long reading |
| Black text on #538EDE | 6.29:1 | AA | Lc 43.5 | Non-text elements, placeholder text |
| #538EDE text on white | 3.33:1 | AA large text | Lc 60.6 | Content text, not long reading |
| #538EDE text on black | 6.29:1 | AA | Lc -41.1 | 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
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADBF2
oklch(88.6% 0.037 256)
-
Step 300
300
#A5C3EC
oklch(80.9% 0.067 256.3)
-
Step 400
400
#74A3E2
oklch(70.7% 0.106 256)
-
Step 500
500 (this color)
#538EDE
oklch(64.3% 0.136 256.5)
-
Step 600
600
#3273C7
oklch(55.7% 0.146 256.2)
-
Step 700
700
#2460AC
oklch(49.2% 0.136 256.1)
-
Step 800
800
#204E8C
oklch(42.6% 0.114 256.9)
-
Step 900
900
#1F4270
oklch(37.8% 0.089 256.1)
-
Step 950
950
#132741
oklch(27% 0.055 255.7)
#538EDE 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) | #6B94E1 | 0.032 |
| Deuteranopia (no green cones) | #5887DC | 0.018 |
| Tritanopia (no blue cones) | #00A0AB | 0.112 |
| Achromatopsia (no color) | #8D8D8D | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538EDE
#538EDE
oklch(64.3% 0.136 256.5)
- #BB8000
#BB8000
oklch(64.4% 0.135 76.4)
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 #538EDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.015
- Chefchaouen Blue #4895EF ΔE 0.028
- Soft Blue #6488EA ΔE 0.031
- Cornflower Blue #6495ED ΔE 0.034
- Faded Blue #658CBB ΔE 0.054
- Water Blue #0E87CC ΔE 0.056
- Dodger Blue #1E90FF ΔE 0.056
- Cool Blue #4984B8 ΔE 0.062
Use #538EDE 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.