#3F58BA
Closest named color: Iris (#6258C4). oklch(49.6% 0.157 269.2), rgb(63, 88, 186).
Aa
White text reads best on this color (6.33:1).
About this color
#3F58BA is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.157 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.051 away. White text reads best on it, at 6.33:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.31:1 |
| White text | 6.33:1 |
Values
| HEX | #3F58BA |
| RGB | rgb(63, 88, 186) |
| HSL | hsl(228, 49%, 49%) |
| OKLCH | oklch(49.6% 0.157 269.2) |
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 #3F58BA | 6.33:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #3F58BA | 3.31:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #3F58BA text on white | 6.33:1 | AA | Lc 81.2 | Fine for body text |
| #3F58BA text on black | 3.31:1 | AA large text | Lc -20.7 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F6
oklch(88.6% 0.042 269)
-
Step 300
300
#ADBFF3
oklch(80.9% 0.076 269.8)
-
Step 400
400
#829CED
oklch(70.6% 0.123 269.6)
-
Step 500
500
#6482E7
oklch(63.2% 0.155 269.2)
-
Step 600
600
#4C69D5
oklch(55.7% 0.169 269)
-
Step 700
700 (this color)
#3F58BA
oklch(49.6% 0.157 269.2)
-
Step 800
800
#334795
oklch(42.6% 0.13 269.4)
-
Step 900
900
#2C3D77
oklch(37.8% 0.101 268.9)
-
Step 950
950
#1A2446
oklch(27.1% 0.065 269.4)
#3F58BA 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) | #1965BD | 0.040 |
| Deuteranopia (no green cones) | #005AB8 | 0.040 |
| Tritanopia (no blue cones) | #006F80 | 0.130 |
| Achromatopsia (no color) | #606060 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F58BA
#3F58BA
oklch(49.6% 0.157 269.2)
- #795E00
#795E00
oklch(49.5% 0.101 89.1)
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 #3F58BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.052
- Warm Blue #4B57DB ΔE 0.054
- French Blue #436BAD ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.067
- Blue With A Hint Of Purple #533CC6 ΔE 0.067
- Dusky Blue #475F94 ΔE 0.067
- Blue Blue #2242C7 ΔE 0.068
Use #3F58BA 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.