#4178A6
Closest named color: Dull Blue (#49759C). oklch(55.5% 0.093 245.8), rgb(65, 120, 166).
Aa
White text reads best on this color (4.70:1).
About this color
#4178A6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.093 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.017 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #4178A6 |
| RGB | rgb(65, 120, 166) |
| HSL | hsl(207, 44%, 45%) |
| OKLCH | oklch(55.5% 0.093 245.8) |
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 #4178A6 | 4.70:1 | AA | Lc -78.0 | Fine for body text |
| Black text on #4178A6 | 4.46:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #4178A6 text on white | 4.70:1 | AA | Lc 72.5 | Content text, not long reading |
| #4178A6 text on black | 4.46:1 | AA large text | Lc -29.2 | Dividers and decoration only |
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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CDDBE8
oklch(88.5% 0.023 246.1)
-
Step 300
300
#ABC4DA
oklch(80.9% 0.041 244.9)
-
Step 400
400
#7EA5C8
oklch(70.6% 0.067 246)
-
Step 500
500
#5C8FBA
oklch(63.1% 0.085 245.2)
-
Step 600
600 (this color)
#4178A6
oklch(55.5% 0.093 245.8)
-
Step 700
700
#33658F
oklch(49.1% 0.087 246.1)
-
Step 800
800
#2B5374
oklch(42.9% 0.071 245.4)
-
Step 900
900
#27445D
oklch(37.6% 0.056 246)
-
Step 950
950
#172837
oklch(26.9% 0.036 246.3)
#4178A6 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) | #6479A8 | 0.040 |
| Deuteranopia (no green cones) | #566FA5 | 0.032 |
| Tritanopia (no blue cones) | #008388 | 0.073 |
| Achromatopsia (no color) | #747474 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4178A6
#4178A6
oklch(55.5% 0.093 245.8)
- #986733
#986733
oklch(55.5% 0.093 65.4)
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 #4178A6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.017
- Flat Blue #3C73A8 ΔE 0.017
- Cerulean #457B9D ΔE 0.019
- Muted Blue #3B719F ΔE 0.023
- Stormy Blue #507B9C ΔE 0.025
- Nice Blue #107AB0 ΔE 0.030
- Steel Blue #4682B4 ΔE 0.033
- Metallic Blue #4F738E ΔE 0.038
Use #4178A6 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.