#597ECF
Closest named color: Cool Blue (#4984B8). oklch(60.3% 0.131 264.3), rgb(89, 126, 207).
Aa
Black text reads best on this color (5.31:1).
About this color
#597ECF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.131 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.046 away. Black text reads best on it, at 5.31:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.31:1 |
| White text | 3.95:1 |
Values
| HEX | #597ECF |
| RGB | rgb(89, 126, 207) |
| HSL | hsl(221, 55%, 58%) |
| OKLCH | oklch(60.3% 0.131 264.3) |
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 #597ECF | 3.95:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #597ECF | 5.31:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #597ECF text on white | 3.95:1 | AA large text | Lc 66.7 | Content text, not long reading |
| #597ECF text on black | 5.31:1 | AA | Lc -34.9 | 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
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F1
oklch(88.4% 0.036 264.4)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#80A0E1
oklch(70.8% 0.102 263.9)
-
Step 500
500 (this color)
#597ECF
oklch(60.3% 0.131 264.3)
-
Step 600
600
#486FC6
oklch(55.7% 0.142 264.2)
-
Step 700
700
#3A5CAB
oklch(49.1% 0.132 264.5)
-
Step 800
800
#304C8A
oklch(42.8% 0.108 264.1)
-
Step 900
900
#2A406F
oklch(37.8% 0.085 263.9)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#597ECF 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) | #5C86D2 | 0.022 |
| Deuteranopia (no green cones) | #4D7BCD | 0.017 |
| Tritanopia (no blue cones) | #00909C | 0.118 |
| Achromatopsia (no color) | #808080 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #597ECF
#597ECF
oklch(60.3% 0.131 264.3)
- #A47A00
#A47A00
oklch(60.5% 0.124 84.3)
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 #597ECF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.046
- Windows Blue #3778BF ΔE 0.046
- Soft Blue #6488EA ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.049
- Steel Blue #4682B4 ΔE 0.051
- Water Blue #0E87CC ΔE 0.052
- Faded Blue #658CBB ΔE 0.058
- Off Blue #5684AE ΔE 0.058
Use #597ECF 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.