#536ECB
Closest named color: Royal Blue (#4169E1). oklch(56.4% 0.147 269.1), rgb(83, 110, 203).
Aa
White text reads best on this color (4.70:1).
About this color
#536ECB is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.147 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.042 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #536ECB |
| RGB | rgb(83, 110, 203) |
| HSL | hsl(227, 54%, 56%) |
| OKLCH | oklch(56.4% 0.147 269.1) |
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 #536ECB | 4.70:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #536ECB | 4.46:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #536ECB text on white | 4.70:1 | AA | Lc 72.5 | Content text, not long reading |
| #536ECB text on black | 4.46:1 | AA large text | Lc -29.2 | 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 600.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#AFC0EC
oklch(81% 0.065 268.4)
-
Step 400
400
#869EE3
oklch(70.8% 0.105 269)
-
Step 500
500
#6884DB
oklch(63.1% 0.135 268.9)
-
Step 600
600 (this color)
#536ECB
oklch(56.4% 0.147 269.1)
-
Step 700
700
#4259AD
oklch(49% 0.136 269.3)
-
Step 800
800
#36498C
oklch(42.6% 0.113 269.3)
-
Step 900
900
#2F3E70
oklch(37.7% 0.088 269.3)
-
Step 950
950
#1B2542
oklch(27.1% 0.056 268.2)
#536ECB 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) | #4279CE | 0.031 |
| Deuteranopia (no green cones) | #306EC9 | 0.035 |
| Tritanopia (no blue cones) | #008393 | 0.128 |
| Achromatopsia (no color) | #737373 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #536ECB
#536ECB
oklch(56.4% 0.147 269.1)
- #917100
#917100
oklch(56.4% 0.115 88.9)
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 #536ECB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.042
- Windows Blue #3778BF ΔE 0.043
- Dark Periwinkle #665FD1 ΔE 0.044
- French Blue #436BAD ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.055
- Iris #6258C4 ΔE 0.056
- Light Indigo #6D5ACF ΔE 0.058
- Mid Blue #276AB3 ΔE 0.060
Use #536ECB 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.