#3F54B6
Closest named color: Iris (#6258C4). oklch(48.5% 0.156 270.4), rgb(63, 84, 182).
Aa
White text reads best on this color (6.65:1).
About this color
#3F54B6 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.156 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.056 away. White text reads best on it, at 6.65:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.15:1 |
| White text | 6.65:1 |
Values
| HEX | #3F54B6 |
| RGB | rgb(63, 84, 182) |
| HSL | hsl(229, 49%, 48%) |
| OKLCH | oklch(48.5% 0.156 270.4) |
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 #3F54B6 | 6.65:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #3F54B6 | 3.15:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #3F54B6 text on white | 6.65:1 | AA | Lc 82.5 | Fine for body text |
| #3F54B6 text on black | 3.15:1 | AA large text | Lc -19.4 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED8F6
oklch(88.4% 0.043 270.9)
-
Step 300
300
#AEBFF2
oklch(80.9% 0.075 270.3)
-
Step 400
400
#849CEC
oklch(70.7% 0.121 270.4)
-
Step 500
500
#6781E6
oklch(63.1% 0.154 270.6)
-
Step 600
600
#4F68D4
oklch(55.6% 0.168 270.3)
-
Step 700
700 (this color)
#3F54B6
oklch(48.5% 0.156 270.4)
-
Step 800
800
#354795
oklch(42.8% 0.129 270.3)
-
Step 900
900
#2E3C77
oklch(37.7% 0.102 270.8)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#3F54B6 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) | #1062B9 | 0.045 |
| Deuteranopia (no green cones) | #0057B4 | 0.042 |
| Tritanopia (no blue cones) | #006B7D | 0.129 |
| Achromatopsia (no color) | #5C5C5C | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F54B6
#3F54B6
oklch(48.5% 0.156 270.4)
- #745C00
#745C00
oklch(48.5% 0.099 91)
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 #3F54B6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.056
- Mid Blue #276AB3 ΔE 0.060
- Warm Blue #4B57DB ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Blue Blue #2242C7 ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.064
- French Blue #436BAD ΔE 0.067
- Blueberry #464196 ΔE 0.067
Use #3F54B6 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.