#607ACC
Closest named color: Windows Blue (#3778BF). oklch(59.7% 0.129 269), rgb(96, 122, 204).
Aa
Black text reads best on this color (5.15:1).
About this color
#607ACC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.129 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.049 away. Black text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #607ACC |
| RGB | rgb(96, 122, 204) |
| HSL | hsl(226, 51%, 59%) |
| OKLCH | oklch(59.7% 0.129 269) |
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 #607ACC | 4.07:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #607ACC | 5.15:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #607ACC text on white | 4.07:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #607ACC text on black | 5.15:1 | AA | Lc -33.9 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#CFD9F1
oklch(88.5% 0.035 267.6)
-
Step 300
300
#B0C0EA
oklch(81% 0.062 268.6)
-
Step 400
400
#879EE0
oklch(70.7% 0.101 269)
-
Step 500
500 (this color)
#607ACC
oklch(59.7% 0.129 269)
-
Step 600
600
#526CC5
oklch(55.5% 0.141 269.2)
-
Step 700
700
#435AAA
oklch(49.1% 0.13 269.1)
-
Step 800
800
#374A8A
oklch(42.7% 0.108 269)
-
Step 900
900
#2F3E6E
oklch(37.6% 0.085 269)
-
Step 950
950
#1C2540
oklch(27.1% 0.052 268.8)
#607ACC 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) | #5983CF | 0.024 |
| Deuteranopia (no green cones) | #4C79CA | 0.024 |
| Tritanopia (no blue cones) | #2B8C99 | 0.116 |
| Achromatopsia (no color) | #7E7E7E | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #607ACC
#607ACC
oklch(59.7% 0.129 269)
- #9D7A00
#9D7A00
oklch(59.7% 0.122 88.5)
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 #607ACC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.049
- Cool Blue #4984B8 ΔE 0.052
- Soft Blue #6488EA ΔE 0.054
- Steel Blue #4682B4 ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.060
- Off Blue #5684AE ΔE 0.061
- Water Blue #0E87CC ΔE 0.062
- Faded Blue #658CBB ΔE 0.063
Use #607ACC 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.