#4591D1
Closest named color: Dark Sky Blue (#448EE4). oklch(63.7% 0.122 246.7), rgb(69, 145, 209).
Aa
Black text reads best on this color (6.22:1).
About this color
#4591D1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.122 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.032 away. Black text reads best on it, at 6.22:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.22:1 |
| White text | 3.37:1 |
Values
| HEX | #4591D1 |
| RGB | rgb(69, 145, 209) |
| HSL | hsl(207, 60%, 55%) |
| OKLCH | oklch(63.7% 0.122 246.7) |
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 #4591D1 | 3.37:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #4591D1 | 6.22:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #4591D1 text on white | 3.37:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #4591D1 text on black | 6.22:1 | AA | Lc -40.8 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A2C5E6
oklch(80.9% 0.06 247)
-
Step 400
400
#6EA6D9
oklch(70.6% 0.096 247.1)
-
Step 500
500 (this color)
#4591D1
oklch(63.7% 0.122 246.7)
-
Step 600
600
#1D78BC
oklch(55.6% 0.133 246.8)
-
Step 700
700
#0B65A2
oklch(49.2% 0.123 246.4)
-
Step 800
800
#105283
oklch(42.6% 0.102 246.8)
-
Step 900
900
#174569
oklch(37.8% 0.079 245.9)
-
Step 950
950
#0F283E
oklch(26.9% 0.052 247.6)
#4591D1 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) | #7593D4 | 0.050 |
| Deuteranopia (no green cones) | #6186D0 | 0.037 |
| Tritanopia (no blue cones) | #00A0A8 | 0.091 |
| Achromatopsia (no color) | #8C8C8C | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4591D1
#4591D1
oklch(63.7% 0.122 246.7)
- #BC7B2C
#BC7B2C
oklch(63.7% 0.122 67)
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 #4591D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.032
- Faded Blue #658CBB ΔE 0.041
- Water Blue #0E87CC ΔE 0.044
- Chefchaouen Blue #4895EF ΔE 0.045
- Cool Blue #4984B8 ΔE 0.046
- Cornflower Blue #6495ED ΔE 0.054
- Steel Blue #4682B4 ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.056
Use #4591D1 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.