#6583DD
Closest named color: Soft Blue (#6488EA). oklch(62.9% 0.14 268.3), rgb(101, 131, 221).
Aa
Black text reads best on this color (5.84:1).
About this color
#6583DD is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.140 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.021 away. Black text reads best on it, at 5.84:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.84:1 |
| White text | 3.59:1 |
Values
| HEX | #6583DD |
| RGB | rgb(101, 131, 221) |
| HSL | hsl(225, 64%, 63%) |
| OKLCH | oklch(62.9% 0.14 268.3) |
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 #6583DD | 3.59:1 | AA large text | Lc -68.8 | Content text, not long reading |
| Black text on #6583DD | 5.84:1 | AA | Lc 40.7 | Non-text elements, placeholder text |
| #6583DD text on white | 3.59:1 | AA large text | Lc 63.4 | Content text, not long reading |
| #6583DD text on black | 5.84:1 | AA | Lc -38.3 | 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 500.
-
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
#CED9F3
oklch(88.5% 0.038 267.3)
-
Step 300
300
#AEC0EE
oklch(81% 0.068 268.2)
-
Step 400
400
#849EE5
oklch(70.8% 0.108 268.2)
-
Step 500
500 (this color)
#6583DD
oklch(62.9% 0.14 268.3)
-
Step 600
600
#4E6BCB
oklch(55.5% 0.152 268.5)
-
Step 700
700
#3F59B0
oklch(49.1% 0.142 268.3)
-
Step 800
800
#34498F
oklch(42.7% 0.118 268.5)
-
Step 900
900
#2D3E72
oklch(37.7% 0.092 268.2)
-
Step 950
950
#1A2543
oklch(27.1% 0.058 267.3)
#6583DD 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) | #5D8DE1 | 0.026 |
| Deuteranopia (no green cones) | #4F82DB | 0.025 |
| Tritanopia (no blue cones) | #2397A5 | 0.126 |
| Achromatopsia (no color) | #878787 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6583DD
#6583DD
oklch(62.9% 0.14 268.3)
- #A98300
#A98300
oklch(62.9% 0.129 88.1)
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 #6583DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.021
- Dark Sky Blue #448EE4 ΔE 0.039
- Cornflower Blue #6495ED ΔE 0.049
- Cornflower #6A79F7 ΔE 0.050
- Chefchaouen Blue #4895EF ΔE 0.052
- Faded Blue #658CBB ΔE 0.063
- Perrywinkle #8F8CE7 ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.067
Use #6583DD 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.