#607ECB
Closest named color: Cool Blue (#4984B8). oklch(60.5% 0.123 266.7), rgb(96, 126, 203).
Aa
Black text reads best on this color (5.34:1).
About this color
#607ECB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.123 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.045 away. Black text reads best on it, at 5.34:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.34:1 |
| White text | 3.92:1 |
Values
| HEX | #607ECB |
| RGB | rgb(96, 126, 203) |
| HSL | hsl(223, 51%, 59%) |
| OKLCH | oklch(60.5% 0.123 266.7) |
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 #607ECB | 3.92:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #607ECB | 5.34:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #607ECB text on white | 3.92:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #607ECB text on black | 5.34:1 | AA | Lc -35.1 | 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
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CFD9F0
oklch(88.5% 0.033 266.9)
-
Step 300
300
#AFC0E8
oklch(80.8% 0.06 267)
-
Step 400
400
#859FDD
oklch(70.7% 0.096 266.5)
-
Step 500
500 (this color)
#607ECB
oklch(60.5% 0.123 266.7)
-
Step 600
600
#4F6EC1
oklch(55.5% 0.134 266.7)
-
Step 700
700
#405CA6
oklch(49.1% 0.123 266.4)
-
Step 800
800
#354B87
oklch(42.6% 0.103 266.9)
-
Step 900
900
#2E3F6C
oklch(37.6% 0.08 266.9)
-
Step 950
950
#1B253F
oklch(26.9% 0.051 267)
#607ECB 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) | #5F86CE | 0.021 |
| Deuteranopia (no green cones) | #537CC9 | 0.017 |
| Tritanopia (no blue cones) | #2B8F9B | 0.110 |
| Achromatopsia (no color) | #808080 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #607ECB
#607ECB
oklch(60.5% 0.123 266.7)
- #A17B05
#A17B05
oklch(60.3% 0.122 86.6)
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 #607ECB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.045
- Steel Blue #4682B4 ΔE 0.049
- Soft Blue #6488EA ΔE 0.051
- Windows Blue #3778BF ΔE 0.051
- Faded Blue #658CBB ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.053
- Off Blue #5684AE ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.057
Use #607ECB 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.