#5973DE
Closest named color: Royal Blue (#4169E1). oklch(59% 0.165 270.4), rgb(89, 115, 222).
Aa
Black text reads best on this color (4.93:1).
About this color
#5973DE is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.165 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.040 away. Black text reads best on it, at 4.93:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.93:1 |
| White text | 4.25:1 |
Values
| HEX | #5973DE |
| RGB | rgb(89, 115, 222) |
| HSL | hsl(228, 67%, 61%) |
| OKLCH | oklch(59% 0.165 270.4) |
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 #5973DE | 4.25:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #5973DE | 4.93:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #5973DE text on white | 4.25:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #5973DE text on black | 4.93:1 | AA | Lc -32.5 | 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 600.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED8F5
oklch(88.4% 0.041 270.4)
-
Step 300
300
#AEBFF2
oklch(80.9% 0.075 270.3)
-
Step 400
400
#849CEB
oklch(70.7% 0.119 270.3)
-
Step 500
500
#6781E4
oklch(63% 0.152 270.5)
-
Step 600
600 (this color)
#5973DE
oklch(59% 0.165 270.4)
-
Step 700
700
#4156B6
oklch(49% 0.153 270.5)
-
Step 800
800
#354794
oklch(42.7% 0.128 270.3)
-
Step 900
900
#2E3C76
oklch(37.6% 0.1 270.7)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#5973DE 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) | #3D81E2 | 0.041 |
| Deuteranopia (no green cones) | #2475DC | 0.046 |
| Tritanopia (no blue cones) | #008B9E | 0.142 |
| Achromatopsia (no color) | #7B7B7B | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5973DE
#5973DE
oklch(59% 0.165 270.4)
- #997900
#997900
oklch(59% 0.121 90.1)
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 #5973DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.040
- Cornflower #6A79F7 ΔE 0.046
- Dark Periwinkle #665FD1 ΔE 0.051
- Medium Slate Blue #7B68EE ΔE 0.057
- Soft Blue #6488EA ΔE 0.058
- Neon Blue #4361EE ΔE 0.060
- Clear Blue #247AFD ΔE 0.061
- Windows Blue #3778BF ΔE 0.063
Use #5973DE 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.