#0537DC
Closest named color: Blue Blue (#2242C7). oklch(45.1% 0.249 264.1), rgb(5, 55, 220).
Aa
White text reads best on this color (8.11:1).
About this color
#0537DC is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.249 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.042 away. White text reads best on it, at 8.11:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.249) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.58:1 |
| White text | 8.11:1 |
Values
| HEX | #0537DC |
| RGB | rgb(5, 55, 220) |
| HSL | hsl(226, 96%, 44%) |
| OKLCH | oklch(45.1% 0.249 264.1) |
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 #0537DC | 8.11:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #0537DC | 2.58:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #0537DC text on white | 8.11:1 | AAA | Lc 86.5 | Fine for body text |
| #0537DC text on black | 2.58:1 | Fails | Lc -15.5 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#709DFF
oklch(70.7% 0.152 264.2)
-
Step 500
500
#4A80FF
oklch(63.1% 0.198 264.2)
-
Step 600
600
#245FFF
oklch(55.6% 0.245 264.2)
-
Step 700
700
#0238FF
oklch(49.1% 0.287 264.1)
-
Step 800
800 (this color)
#0537DC
oklch(45.1% 0.249 264.1)
-
Step 900
900
#072EA6
oklch(37.7% 0.194 264.2)
-
Step 950
950
#061D61
oklch(26.9% 0.123 264.4)
#0537DC 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) | #005AE1 | 0.072 |
| Deuteranopia (no green cones) | #0045D9 | 0.025 |
| Tritanopia (no blue cones) | #006987 | 0.188 |
| Achromatopsia (no color) | #505050 | 0.250 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0537DC
#0537DC
oklch(45.1% 0.249 264.1)
- #6D5000
#6D5000
oklch(45% 0.092 84.4)
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 #0537DC, closest first.
No curated palette has a color within ΔE 0.04 of #0537DC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.042
- Vibrant Blue #0339F8 ΔE 0.045
- Ultramarine Blue #1805DB ΔE 0.049
- Rich Blue #021BF9 ΔE 0.050
- Pure Blue #0203E2 ΔE 0.051
- Vivid Blue #152EFF ΔE 0.054
- Strong Blue #0C06F7 ΔE 0.054
- Primary Blue #0804F9 ΔE 0.057
Use #0537DC 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.