#064583
Closest named color: Twilight Blue (#0A437A). oklch(39.2% 0.119 253.9), rgb(6, 69, 131).
Aa
White text reads best on this color (9.60:1).
About this color
#064583 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.119 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.015 away. White text reads best on it, at 9.60:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.18:1 |
| White text | 9.60:1 |
Values
| HEX | #064583 |
| RGB | rgb(6, 69, 131) |
| HSL | hsl(210, 91%, 27%) |
| OKLCH | oklch(39.2% 0.119 253.9) |
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 #064583 | 9.60:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #064583 | 2.18:1 | Fails | Lc 12.3 | Not readable |
| #064583 text on white | 9.60:1 | AAA | Lc 91.7 | Preferred for body text |
| #064583 text on black | 2.18:1 | Fails | Lc -10.7 | Not readable |
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 900.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFB
oklch(93.5% 0.026 253.6)
-
Step 200
200
#C3DCFA
oklch(88.6% 0.049 253.1)
-
Step 300
300
#98C4FA
oklch(80.9% 0.09 253.9)
-
Step 400
400
#5CA3F7
oklch(70.6% 0.143 253.9)
-
Step 500
500
#2389F4
oklch(63.1% 0.183 254)
-
Step 600
600
#0072D6
oklch(55.6% 0.176 253.8)
-
Step 700
700
#0060B6
oklch(49.2% 0.156 253.8)
-
Step 800
800
#004E96
oklch(42.7% 0.135 253.8)
-
Step 900
900 (this color)
#064583
oklch(39.2% 0.119 253.9)
-
Step 950
950
#06264A
oklch(26.9% 0.076 254.4)
#064583 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) | #234B85 | 0.028 |
| Deuteranopia (no green cones) | #004082 | 0.015 |
| Tritanopia (no blue cones) | #00545D | 0.089 |
| Achromatopsia (no color) | #454545 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #064583
#064583
oklch(39.2% 0.119 253.9)
- #603D00
#603D00
oklch(39.2% 0.083 73)
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 #064583, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.015
- Cobalt #1E488F ΔE 0.027
- Light Navy #155084 ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.045
- Dusk Blue #26538D ΔE 0.051
- Marine Blue #01386A ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.071
- Dark Grey Blue #29465B ΔE 0.072
Use #064583 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.