#6597DF
Closest named color: Cornflower Blue (#6495ED). oklch(67.2% 0.12 257.5), rgb(101, 151, 223).
Aa
Black text reads best on this color (7.04:1).
About this color
#6597DF is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.120 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.023 away. Black text reads best on it, at 7.04:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.04:1 |
| White text | 2.98:1 |
Values
| HEX | #6597DF |
| RGB | rgb(101, 151, 223) |
| HSL | hsl(215, 66%, 64%) |
| OKLCH | oklch(67.2% 0.12 257.5) |
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 #6597DF | 2.98:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #6597DF | 7.04:1 | AAA | Lc 47.8 | Large or bold text, headings |
| #6597DF text on white | 2.98:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #6597DF text on black | 7.04:1 | AAA | Lc -45.5 | Large or bold text, headings |
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 400.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A2C3F1
oklch(80.9% 0.075 256.7)
-
Step 400
400 (this color)
#6597DF
oklch(67.2% 0.12 257.5)
-
Step 500
500
#4889E5
oklch(63.2% 0.154 257.4)
-
Step 600
600
#2870D3
oklch(55.5% 0.168 257.6)
-
Step 700
700
#1B5EB6
oklch(49.2% 0.154 257.3)
-
Step 800
800
#194D94
oklch(42.8% 0.129 257.5)
-
Step 900
900
#1B4176
oklch(37.8% 0.1 257.4)
-
Step 950
950
#112645
oklch(27% 0.064 258.1)
#6597DF 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) | #7A9CE2 | 0.029 |
| Deuteranopia (no green cones) | #6B90DD | 0.019 |
| Tritanopia (no blue cones) | #15A7B1 | 0.107 |
| Achromatopsia (no color) | #959595 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6597DF
#6597DF
oklch(67.2% 0.12 257.5)
- #BF8B32
#BF8B32
oklch(67.2% 0.121 77.1)
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 #6597DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.023
- Chefchaouen Blue #4895EF ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.043
- Soft Blue #6488EA ΔE 0.047
- Faded Blue #658CBB ΔE 0.056
- Perrywinkle #8F8CE7 ΔE 0.059
- Periwinkle Blue #8F99FB ΔE 0.068
- Dodger Blue #1E90FF ΔE 0.073
Use #6597DF 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.