#343CEE
Closest named color: Light Royal Blue (#3A2EFE). oklch(49% 0.257 270.2), rgb(52, 60, 238).
Aa
White text reads best on this color (6.93:1).
About this color
#343CEE is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.257 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Light Royal Blue (#3A2EFE), ΔE 0.028 away. White text reads best on it, at 6.93:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.257) |
| Temperature | cool |
| Nearest name | Light Royal Blue (#3A2EFE) |
| Black text | 3.02:1 |
| White text | 6.93:1 |
Values
| HEX | #343CEE |
| RGB | rgb(52, 60, 238) |
| HSL | hsl(237, 85%, 57%) |
| OKLCH | oklch(49% 0.257 270.2) |
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 #343CEE | 6.93:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #343CEE | 3.02:1 | AA large text | Lc 21.3 | Dividers and decoration only |
| #343CEE text on white | 6.93:1 | AA | Lc 82.8 | Fine for body text |
| #343CEE text on black | 3.02:1 | AA large text | Lc -19.2 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5E7BFF
oklch(63.1% 0.198 270.4)
-
Step 600
600
#4359FF
oklch(55.7% 0.244 270.2)
-
Step 700
700 (this color)
#343CEE
oklch(49% 0.257 270.2)
-
Step 800
800
#2A34C0
oklch(42.6% 0.213 270.2)
-
Step 900
900
#243197
oklch(37.6% 0.165 270.3)
-
Step 950
950
#141E59
oklch(26.9% 0.106 270.2)
#343CEE 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) | #0063F3 | 0.076 |
| Deuteranopia (no green cones) | #0050EB | 0.040 |
| Tritanopia (no blue cones) | #007193 | 0.197 |
| Achromatopsia (no color) | #5A5A5A | 0.258 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343CEE
#343CEE
oklch(49% 0.257 270.2)
- #765D00
#765D00
oklch(49% 0.1 90.4)
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 #343CEE, closest first.
No curated palette has a color within ΔE 0.04 of #343CEE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Royal Blue #3A2EFE ΔE 0.028
- Vibrant Blue #0339F8 ΔE 0.036
- Vivid Blue #152EFF ΔE 0.043
- Electric Blue #0652FF ΔE 0.051
- Majorelle Blue #3F37C9 ΔE 0.061
- Rich Blue #021BF9 ΔE 0.062
- Azul #1D5DEC ΔE 0.062
- Purpley Blue #5F34E7 ΔE 0.063
Use #343CEE 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.