#507FAE
Closest named color: Steel Blue (#4682B4). oklch(58.3% 0.089 249.6), rgb(80, 127, 174).
Aa
Black text reads best on this color (4.98:1).
About this color
#507FAE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.089 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.013 away. Black text reads best on it, at 4.98:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.98:1 |
| White text | 4.21:1 |
Values
| HEX | #507FAE |
| RGB | rgb(80, 127, 174) |
| HSL | hsl(210, 37%, 50%) |
| OKLCH | oklch(58.3% 0.089 249.6) |
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 #507FAE | 4.21:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #507FAE | 4.98:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #507FAE text on white | 4.21:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #507FAE 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
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#AEC3DA
oklch(80.9% 0.04 250.7)
-
Step 400
400
#82A4C8
oklch(70.6% 0.065 250.2)
-
Step 500
500
#628DB9
oklch(63% 0.082 249.8)
-
Step 600
600 (this color)
#507FAE
oklch(58.3% 0.089 249.6)
-
Step 700
700
#39648E
oklch(49.1% 0.083 249.3)
-
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)
#507FAE 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) | #6C81B0 | 0.035 |
| Deuteranopia (no green cones) | #5F77AD | 0.026 |
| Tritanopia (no blue cones) | #178A8F | 0.077 |
| Achromatopsia (no color) | #7B7B7B | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #507FAE
#507FAE
oklch(58.3% 0.089 249.6)
- #9D713C
#9D713C
oklch(58.2% 0.089 69.6)
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 #507FAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.013
- Off Blue #5684AE ΔE 0.017
- Cool Blue #4984B8 ΔE 0.018
- Dusty Blue #5A86AD ΔE 0.025
- Stormy Blue #507B9C ΔE 0.028
- Cerulean #457B9D ΔE 0.031
- Dull Blue #49759C ΔE 0.038
- Flat Blue #3C73A8 ΔE 0.043
Use #507FAE 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.