#5370D7
Closest named color: Royal Blue (#4169E1). oklch(57.6% 0.161 269.1), rgb(83, 112, 215).
Aa
Black text reads best on this color (4.66:1).
About this color
#5370D7 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.161 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.033 away. Black text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.66:1 |
| White text | 4.49:1 |
Values
| HEX | #5370D7 |
| RGB | rgb(83, 112, 215) |
| HSL | hsl(227, 62%, 58%) |
| OKLCH | oklch(57.6% 0.161 269.1) |
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 #5370D7 | 4.49:1 | AA large text | Lc -76.4 | Fine for body text |
| Black text on #5370D7 | 4.66:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #5370D7 text on white | 4.49:1 | AA large text | Lc 71.0 | Content text, not long reading |
| #5370D7 text on black | 4.66:1 | AA | Lc -30.7 | 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
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#ADBFF0
oklch(80.8% 0.072 269)
-
Step 400
400
#839DE9
oklch(70.7% 0.116 268.9)
-
Step 500
500
#6583E2
oklch(63.2% 0.147 268.7)
-
Step 600
600 (this color)
#5370D7
oklch(57.6% 0.161 269.1)
-
Step 700
700
#3F58B4
oklch(49.2% 0.149 268.9)
-
Step 800
800
#344892
oklch(42.7% 0.124 269.2)
-
Step 900
900
#2D3D74
oklch(37.6% 0.096 269.2)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#5370D7 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) | #3C7DDB | 0.037 |
| Deuteranopia (no green cones) | #2271D5 | 0.041 |
| Tritanopia (no blue cones) | #008899 | 0.139 |
| Achromatopsia (no color) | #777777 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5370D7
#5370D7
oklch(57.6% 0.161 269.1)
- #957400
#957400
oklch(57.5% 0.118 88.7)
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 #5370D7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.033
- Dark Periwinkle #665FD1 ΔE 0.045
- Windows Blue #3778BF ΔE 0.053
- Neon Blue #4361EE ΔE 0.057
- Slate Blue #6A5ACD ΔE 0.058
- Light Indigo #6D5ACF ΔE 0.060
- Cornflower #6A79F7 ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.061
Use #5370D7 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.