#4B7ECF
Closest named color: Windows Blue (#3778BF). oklch(59.6% 0.136 259.3), rgb(75, 126, 207).
Aa
Black text reads best on this color (5.18:1).
About this color
#4B7ECF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.136 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.035 away. Black text reads best on it, at 5.18:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.18:1 |
| White text | 4.05:1 |
Values
| HEX | #4B7ECF |
| RGB | rgb(75, 126, 207) |
| HSL | hsl(217, 58%, 55%) |
| OKLCH | oklch(59.6% 0.136 259.3) |
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 #4B7ECF | 4.05:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #4B7ECF | 5.18:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #4B7ECF text on white | 4.05:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #4B7ECF text on black | 5.18:1 | AA | Lc -34.2 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF7
oklch(93.5% 0.02 260.2)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A7C2EC
oklch(80.8% 0.067 259.1)
-
Step 400
400
#78A2E3
oklch(70.8% 0.106 258.9)
-
Step 500
500 (this color)
#4B7ECF
oklch(59.6% 0.136 259.3)
-
Step 600
600
#3A71C8
oklch(55.6% 0.147 259.3)
-
Step 700
700
#2C5EAD
oklch(49.1% 0.137 259.3)
-
Step 800
800
#254D8C
oklch(42.6% 0.114 259.2)
-
Step 900
900
#234170
oklch(37.7% 0.088 259.1)
-
Step 950
950
#152642
oklch(27% 0.057 259.9)
#4B7ECF 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) | #5A85D2 | 0.027 |
| Deuteranopia (no green cones) | #4779CD | 0.015 |
| Tritanopia (no blue cones) | #00909C | 0.112 |
| Achromatopsia (no color) | #7E7E7E | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B7ECF
#4B7ECF
oklch(59.6% 0.136 259.3)
- #A67500
#A67500
oklch(59.7% 0.124 79.4)
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 #4B7ECF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.035
- Water Blue #0E87CC ΔE 0.040
- Cool Blue #4984B8 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.048
- Soft Blue #6488EA ΔE 0.056
- Off Blue #5684AE ΔE 0.059
- Faded Blue #658CBB ΔE 0.063
Use #4B7ECF 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.