#507FAD
Closest named color: Steel Blue (#4682B4). oklch(58.2% 0.088 249.1), rgb(80, 127, 173).
Aa
Black text reads best on this color (4.98:1).
About this color
#507FAD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.088 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.014 away. Black text reads best on it, at 4.98:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.98:1 |
| White text | 4.21:1 |
Values
| HEX | #507FAD |
| RGB | rgb(80, 127, 173) |
| HSL | hsl(210, 37%, 50%) |
| OKLCH | oklch(58.2% 0.088 249.1) |
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 #507FAD | 4.21:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #507FAD | 4.98:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #507FAD text on white | 4.21:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #507FAD text on black | 4.98:1 | AA | Lc -32.7 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE7
oklch(88.5% 0.022 245.9)
-
Step 300
300
#AEC3DA
oklch(80.9% 0.04 250.7)
-
Step 400
400
#82A4C7
oklch(70.6% 0.064 249.5)
-
Step 500
500
#628EB9
oklch(63.2% 0.081 248.7)
-
Step 600
600 (this color)
#507FAD
oklch(58.2% 0.088 249.1)
-
Step 700
700
#39648D
oklch(49.1% 0.082 248.8)
-
Step 800
800
#305273
oklch(42.8% 0.068 249)
-
Step 900
900
#2B445D
oklch(37.8% 0.053 249.4)
-
Step 950
950
#192836
oklch(27% 0.033 247.4)
#507FAD 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) | #6C80AF | 0.034 |
| Deuteranopia (no green cones) | #6077AC | 0.027 |
| Tritanopia (no blue cones) | #198A8F | 0.076 |
| Achromatopsia (no color) | #7B7B7B | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #507FAD
#507FAD
oklch(58.2% 0.088 249.1)
- #9D713E
#9D713E
oklch(58.2% 0.088 68.7)
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 #507FAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.014
- Off Blue #5684AE ΔE 0.017
- Cool Blue #4984B8 ΔE 0.019
- Dusty Blue #5A86AD ΔE 0.024
- Stormy Blue #507B9C ΔE 0.026
- Cerulean #457B9D ΔE 0.029
- Dull Blue #49759C ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.042
Use #507FAD 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.