#4591CE
Closest named color: Dark Sky Blue (#448EE4). oklch(63.6% 0.119 245.5), rgb(69, 145, 206).
Aa
Black text reads best on this color (6.19:1).
About this color
#4591CE is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.119 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.036 away. Black text reads best on it, at 6.19:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.19:1 |
| White text | 3.39:1 |
Values
| HEX | #4591CE |
| RGB | rgb(69, 145, 206) |
| HSL | hsl(207, 58%, 54%) |
| OKLCH | oklch(63.6% 0.119 245.5) |
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 #4591CE | 3.39:1 | AA large text | Lc -66.6 | Content text, not long reading |
| Black text on #4591CE | 6.19:1 | AA | Lc 42.9 | Non-text elements, placeholder text |
| #4591CE text on white | 3.39:1 | AA large text | Lc 61.1 | Content text, not long reading |
| #4591CE text on black | 6.19:1 | AA | Lc -40.6 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A2C5E4
oklch(80.8% 0.058 245.3)
-
Step 400
400
#6EA7D7
oklch(70.8% 0.093 245)
-
Step 500
500 (this color)
#4591CE
oklch(63.6% 0.119 245.5)
-
Step 600
600
#1D79B9
oklch(55.7% 0.128 245.1)
-
Step 700
700
#0C65A0
oklch(49.1% 0.121 245.7)
-
Step 800
800
#115382
oklch(42.8% 0.1 245.6)
-
Step 900
900
#184568
oklch(37.8% 0.077 245.6)
-
Step 950
950
#0F293D
oklch(27.1% 0.049 244.3)
#4591CE 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) | #7693D1 | 0.052 |
| Deuteranopia (no green cones) | #6385CD | 0.040 |
| Tritanopia (no blue cones) | #00A0A6 | 0.090 |
| Achromatopsia (no color) | #8B8B8B | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4591CE
#4591CE
oklch(63.6% 0.119 245.5)
- #BB7A31
#BB7A31
oklch(63.4% 0.119 65.4)
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 #4591CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.036
- Faded Blue #658CBB ΔE 0.038
- Water Blue #0E87CC ΔE 0.043
- Cool Blue #4984B8 ΔE 0.043
- Chefchaouen Blue #4895EF ΔE 0.050
- Steel Blue #4682B4 ΔE 0.051
- Dusty Blue #5A86AD ΔE 0.053
- Off Blue #5684AE ΔE 0.053
Use #4591CE 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.