#4259BD
Closest named color: Iris (#6258C4). oklch(50.2% 0.159 270), rgb(66, 89, 189).
Aa
White text reads best on this color (6.18:1).
About this color
#4259BD is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.159 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.046 away. White text reads best on it, at 6.18:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.39:1 |
| White text | 6.18:1 |
Values
| HEX | #4259BD |
| RGB | rgb(66, 89, 189) |
| HSL | hsl(229, 48%, 50%) |
| OKLCH | oklch(50.2% 0.159 270) |
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 #4259BD | 6.18:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #4259BD | 3.39:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #4259BD text on white | 6.18:1 | AA | Lc 80.5 | Fine for body text |
| #4259BD text on black | 3.39:1 | AA large text | Lc -21.3 | 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
#ADBFF3
oklch(80.9% 0.076 269.8)
-
Step 400
400
#839CED
oklch(70.7% 0.122 270)
-
Step 500
500
#6581E8
oklch(63.1% 0.158 270)
-
Step 600
600
#4E68D6
oklch(55.6% 0.171 270)
-
Step 700
700 (this color)
#4259BD
oklch(50.2% 0.159 270)
-
Step 800
800
#344796
oklch(42.8% 0.131 269.9)
-
Step 900
900
#2D3C77
oklch(37.6% 0.102 270.2)
-
Step 950
950
#1A2446
oklch(27.1% 0.065 269.4)
#4259BD 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) | #1867C1 | 0.044 |
| Deuteranopia (no green cones) | #005CBB | 0.043 |
| Tritanopia (no blue cones) | #007182 | 0.134 |
| Achromatopsia (no color) | #616161 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4259BD
#4259BD
oklch(50.2% 0.159 270)
- #7A6000
#7A6000
oklch(50.1% 0.102 90.2)
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 #4259BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.046
- Warm Blue #4B57DB ΔE 0.049
- Mid Blue #276AB3 ΔE 0.053
- French Blue #436BAD ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.062
- Slate Blue #6A5ACD ΔE 0.062
- Royal Blue #4169E1 ΔE 0.066
- Blue With A Hint Of Purple #533CC6 ΔE 0.067
Use #4259BD 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.