#5873D4
Closest named color: Royal Blue (#4169E1). oklch(58.3% 0.151 269.5), rgb(88, 115, 212).
Aa
Black text reads best on this color (4.81:1).
About this color
#5873D4 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.151 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.044 away. Black text reads best on it, at 4.81:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.81:1 |
| White text | 4.35:1 |
Values
| HEX | #5873D4 |
| RGB | rgb(88, 115, 212) |
| HSL | hsl(227, 59%, 59%) |
| OKLCH | oklch(58.3% 0.151 269.5) |
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 #5873D4 | 4.35:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #5873D4 | 4.81:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #5873D4 text on white | 4.35:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #5873D4 text on black | 4.81:1 | AA | Lc -31.7 | 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
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CFD9F3
oklch(88.6% 0.037 268.9)
-
Step 300
300
#AFBFEE
oklch(80.9% 0.069 270.1)
-
Step 400
400
#859DE5
oklch(70.6% 0.109 269.4)
-
Step 500
500
#6883DD
oklch(63% 0.139 269.5)
-
Step 600
600 (this color)
#5873D4
oklch(58.3% 0.151 269.5)
-
Step 700
700
#4259B0
oklch(49.2% 0.141 269.5)
-
Step 800
800
#36498E
oklch(42.7% 0.116 269.4)
-
Step 900
900
#2F3E71
oklch(37.8% 0.089 269.4)
-
Step 950
950
#1B2442
oklch(26.9% 0.057 269.6)
#5873D4 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) | #467FD8 | 0.033 |
| Deuteranopia (no green cones) | #3374D2 | 0.036 |
| Tritanopia (no blue cones) | #008999 | 0.134 |
| Achromatopsia (no color) | #797979 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5873D4
#5873D4
oklch(58.3% 0.151 269.5)
- #977700
#977700
oklch(58.4% 0.119 89.8)
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 #5873D4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.044
- Windows Blue #3778BF ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.050
- Cornflower #6A79F7 ΔE 0.060
- Slate Blue #6A5ACD ΔE 0.063
- Soft Blue #6488EA ΔE 0.064
- Light Indigo #6D5ACF ΔE 0.064
- Medium Slate Blue #7B68EE ΔE 0.067
Use #5873D4 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.