#3591C6
Closest named color: Cool Blue (#4984B8). oklch(62.6% 0.117 238.3), rgb(53, 145, 198).
Aa
Black text reads best on this color (6.01:1).
About this color
#3591C6 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.117 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.038 away. Black text reads best on it, at 6.01:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 6.01:1 |
| White text | 3.49:1 |
Values
| HEX | #3591C6 |
| RGB | rgb(53, 145, 198) |
| HSL | hsl(202, 58%, 49%) |
| OKLCH | oklch(62.6% 0.117 238.3) |
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 #3591C6 | 3.49:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #3591C6 | 6.01:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #3591C6 text on white | 3.49:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #3591C6 text on black | 6.01:1 | AA | Lc -39.6 | 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
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C7DDEC
oklch(88.6% 0.031 237.6)
-
Step 300
300
#9FC7E2
oklch(81% 0.057 237.9)
-
Step 400
400
#67A9D3
oklch(70.7% 0.091 237.9)
-
Step 500
500 (this color)
#3591C6
oklch(62.6% 0.117 238.3)
-
Step 600
600
#007CB3
oklch(55.7% 0.124 238.2)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#0E4765
oklch(37.8% 0.076 237.6)
-
Step 950
950
#0B293B
oklch(26.8% 0.049 238.8)
#3591C6 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) | #7891C8 | 0.065 |
| Deuteranopia (no green cones) | #6483C5 | 0.053 |
| Tritanopia (no blue cones) | #009EA3 | 0.077 |
| Achromatopsia (no color) | #898989 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3591C6
#3591C6
oklch(62.6% 0.117 238.3)
- #BC7539
#BC7539
oklch(62.7% 0.117 58.3)
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 #3591C6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.038
- Water Blue #0E87CC ΔE 0.038
- Blue NCS #118AB2 ΔE 0.040
- Faded Blue #658CBB ΔE 0.042
- Steel Blue #4682B4 ΔE 0.044
- Dusty Blue #5A86AD ΔE 0.047
- Off Blue #5684AE ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.051
Use #3591C6 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.