#3A5FBF
Closest named color: Mid Blue (#276AB3). oklch(51.1% 0.157 265.4), rgb(58, 95, 191).
Aa
White text reads best on this color (5.88:1).
About this color
#3A5FBF is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.157 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.039 away. White text reads best on it, at 5.88:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.56:1 |
| White text | 5.88:1 |
Values
| HEX | #3A5FBF |
| RGB | rgb(58, 95, 191) |
| HSL | hsl(223, 53%, 49%) |
| OKLCH | oklch(51.1% 0.157 265.4) |
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 #3A5FBF | 5.88:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #3A5FBF | 3.56:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #3A5FBF text on white | 5.88:1 | AA | Lc 79.1 | Fine for body text |
| #3A5FBF text on black | 3.56:1 | AA large text | Lc -22.7 | 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 700.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#A9C0F3
oklch(80.8% 0.077 265.8)
-
Step 400
400
#7C9EEC
oklch(70.6% 0.121 265.5)
-
Step 500
500
#5B84E6
oklch(63% 0.154 265.2)
-
Step 600
600
#426BD5
oklch(55.6% 0.169 265.3)
-
Step 700
700 (this color)
#3A5FBF
oklch(51.1% 0.157 265.4)
-
Step 800
800
#2C4995
oklch(42.7% 0.13 265.5)
-
Step 900
900
#273E77
oklch(37.7% 0.101 265.3)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#3A5FBF 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) | #276BC2 | 0.032 |
| Deuteranopia (no green cones) | #005FBD | 0.033 |
| Tritanopia (no blue cones) | #007686 | 0.127 |
| Achromatopsia (no color) | #646464 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A5FBF
#3A5FBF
oklch(51.1% 0.157 265.4)
- #826100
#826100
oklch(51.2% 0.105 85.3)
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 #3A5FBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.039
- French Blue #436BAD ΔE 0.048
- Warm Blue #4B57DB ΔE 0.052
- Iris #6258C4 ΔE 0.053
- Royal Blue #4169E1 ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.064
- Slate Blue #6A5ACD ΔE 0.067
- Windows Blue #3778BF ΔE 0.068
Use #3A5FBF 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.