#4259DE
Closest named color: Warm Blue (#4B57DB). oklch(52.8% 0.203 270.3), rgb(66, 89, 222).
Aa
White text reads best on this color (5.65:1).
About this color
#4259DE is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.203 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.012 away. White text reads best on it, at 5.65:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.203) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #4259DE |
| RGB | rgb(66, 89, 222) |
| HSL | hsl(231, 70%, 56%) |
| OKLCH | oklch(52.8% 0.203 270.3) |
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 #4259DE | 5.65:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #4259DE | 3.71:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #4259DE text on white | 5.65:1 | AA | Lc 77.7 | Fine for body text |
| #4259DE text on black | 3.71:1 | AA large text | Lc -24.1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#AABEFD
oklch(80.9% 0.092 270.6)
-
Step 400
400
#7E9AFB
oklch(70.7% 0.146 270.2)
-
Step 500
500
#607DF9
oklch(63.1% 0.187 270.3)
-
Step 600
600 (this color)
#4259DE
oklch(52.8% 0.203 270.3)
-
Step 700
700
#3B50CA
oklch(49.1% 0.19 270.3)
-
Step 800
800
#3143A3
oklch(42.8% 0.156 270.4)
-
Step 900
900
#2A3A81
oklch(37.8% 0.121 270.1)
-
Step 950
950
#18224C
oklch(26.9% 0.079 270.3)
#4259DE 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) | #006EE2 | 0.055 |
| Deuteranopia (no green cones) | #0060DB | 0.040 |
| Tritanopia (no blue cones) | #007B93 | 0.164 |
| Achromatopsia (no color) | #676767 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4259DE
#4259DE
oklch(52.8% 0.203 270.3)
- #836700
#836700
oklch(52.7% 0.108 89.9)
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 #4259DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.012
- Neon Blue #4361EE ΔE 0.031
- Azul #1D5DEC ΔE 0.035
- Royal Blue #4169E1 ΔE 0.038
- Dark Periwinkle #665FD1 ΔE 0.056
- Cerulean Blue #056EEE ΔE 0.058
- Iris #6258C4 ΔE 0.058
- Bright Blue #0165FC ΔE 0.059
Use #4259DE 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.