#507EBB
Closest named color: Cool Blue (#4984B8). oklch(58.7% 0.107 255.9), rgb(80, 126, 187).
Aa
Black text reads best on this color (5.04:1).
About this color
#507EBB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.107 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.019 away. Black text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #507EBB |
| RGB | rgb(80, 126, 187) |
| HSL | hsl(214, 44%, 52%) |
| OKLCH | oklch(58.7% 0.107 255.9) |
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 #507EBB | 4.16:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #507EBB | 5.04:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #507EBB text on white | 4.16:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #507EBB text on black | 5.04:1 | AA | Lc -33.1 | 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 600.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#ADC3E0
oklch(81% 0.048 255.4)
-
Step 400
400
#81A3D1
oklch(70.7% 0.078 256.1)
-
Step 500
500
#618BC4
oklch(63% 0.098 256.3)
-
Step 600
600 (this color)
#507EBB
oklch(58.7% 0.107 255.9)
-
Step 700
700
#386298
oklch(49.2% 0.099 255.4)
-
Step 800
800
#2F507B
oklch(42.7% 0.082 255.6)
-
Step 900
900
#2A4363
oklch(37.8% 0.063 255.1)
-
Step 950
950
#19273A
oklch(27% 0.041 256.3)
#507EBB 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) | #6582BE | 0.028 |
| Deuteranopia (no green cones) | #5778BA | 0.017 |
| Tritanopia (no blue cones) | #008C94 | 0.094 |
| Achromatopsia (no color) | #7C7C7C | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #507EBB
#507EBB
oklch(58.7% 0.107 255.9)
- #A17326
#A17326
oklch(58.9% 0.108 76.2)
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 #507EBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.019
- Steel Blue #4682B4 ΔE 0.020
- Off Blue #5684AE ΔE 0.031
- Windows Blue #3778BF ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.038
- Water Blue #0E87CC ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.047
- Stormy Blue #507B9C ΔE 0.048
Use #507EBB 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.