#538DCF
Closest named color: Dark Sky Blue (#448EE4). oklch(63.3% 0.117 252.9), rgb(83, 141, 207).
Aa
Black text reads best on this color (6.07:1).
About this color
#538DCF is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.117 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.033 away. Black text reads best on it, at 6.07:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.07:1 |
| White text | 3.45:1 |
Values
| HEX | #538DCF |
| RGB | rgb(83, 141, 207) |
| HSL | hsl(212, 56%, 57%) |
| OKLCH | oklch(63.3% 0.117 252.9) |
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 #538DCF | 3.45:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #538DCF | 6.07:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #538DCF text on white | 3.45:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #538DCF text on black | 6.07:1 | AA | Lc -39.8 | 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
#CBDBEE
oklch(88.5% 0.031 252.7)
-
Step 300
300
#A7C4E5
oklch(81% 0.056 251.8)
-
Step 400
400
#77A4D9
oklch(70.7% 0.092 253.1)
-
Step 500
500 (this color)
#538DCF
oklch(63.3% 0.117 252.9)
-
Step 600
600
#3575BB
oklch(55.5% 0.127 252.8)
-
Step 700
700
#2762A2
oklch(49.1% 0.119 253)
-
Step 800
800
#225083
oklch(42.6% 0.099 253.1)
-
Step 900
900
#214369
oklch(37.7% 0.077 252.8)
-
Step 950
950
#14273D
oklch(26.8% 0.048 253.2)
#538DCF 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) | #7191D2 | 0.036 |
| Deuteranopia (no green cones) | #6185CE | 0.024 |
| Tritanopia (no blue cones) | #009CA5 | 0.097 |
| Achromatopsia (no color) | #8A8A8A | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538DCF
#538DCF
oklch(63.3% 0.117 252.9)
- #B57D2B
#B57D2B
oklch(63.2% 0.118 72.4)
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 #538DCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.033
- Faded Blue #658CBB ΔE 0.034
- Cool Blue #4984B8 ΔE 0.042
- Water Blue #0E87CC ΔE 0.047
- Chefchaouen Blue #4895EF ΔE 0.048
- Soft Blue #6488EA ΔE 0.050
- Steel Blue #4682B4 ΔE 0.050
- Dusty Blue #5A86AD ΔE 0.051
Use #538DCF 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.