#4591B6
Closest named color: Dusty Blue (#5A86AD). oklch(62.4% 0.093 232.1), rgb(69, 145, 182).
Aa
Black text reads best on this color (5.97:1).
About this color
#4591B6 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.093 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.033 away. Black text reads best on it, at 5.97:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.97:1 |
| White text | 3.51:1 |
Values
| HEX | #4591B6 |
| RGB | rgb(69, 145, 182) |
| HSL | hsl(200, 45%, 49%) |
| OKLCH | oklch(62.4% 0.093 232.1) |
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 #4591B6 | 3.51:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #4591B6 | 5.97:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #4591B6 text on white | 3.51:1 | AA large text | Lc 62.5 | Content text, not long reading |
| #4591B6 text on black | 5.97:1 | AA | Lc -39.2 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A4C6D9
oklch(80.8% 0.045 232.5)
-
Step 400
400
#71A9C7
oklch(70.7% 0.073 232.6)
-
Step 500
500 (this color)
#4591B6
oklch(62.4% 0.093 232.1)
-
Step 600
600
#237DA4
oklch(55.6% 0.101 231.9)
-
Step 700
700
#12698D
oklch(49% 0.095 232.4)
-
Step 800
800
#155672
oklch(42.7% 0.078 231.8)
-
Step 900
900
#1A475C
oklch(37.7% 0.06 231.8)
-
Step 950
950
#112A36
oklch(27.1% 0.038 231.3)
#4591B6 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) | #7F8FB8 | 0.063 |
| Deuteranopia (no green cones) | #6F84B5 | 0.053 |
| Tritanopia (no blue cones) | #009B9D | 0.063 |
| Achromatopsia (no color) | #898989 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4591B6
#4591B6
oklch(62.4% 0.093 232.1)
- #B47751
#B47751
oklch(62.4% 0.093 52.2)
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 #4591B6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.033
- Faded Blue #658CBB ΔE 0.035
- Off Blue #5684AE ΔE 0.037
- Blue NCS #118AB2 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.038
- Steel Blue #4682B4 ΔE 0.043
- Silver Lake Blue #778DA9 ΔE 0.053
- Blue Grey #758DA3 ΔE 0.053
Use #4591B6 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.