#3457D9
Closest named color: Warm Blue (#4B57DB). oklch(51.3% 0.203 267.1), rgb(52, 87, 217).
Aa
White text reads best on this color (5.98:1).
About this color
#3457D9 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.203 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.026 away. White text reads best on it, at 5.98:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.203) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.51:1 |
| White text | 5.98:1 |
Values
| HEX | #3457D9 |
| RGB | rgb(52, 87, 217) |
| HSL | hsl(227, 68%, 53%) |
| OKLCH | oklch(51.3% 0.203 267.1) |
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 #3457D9 | 5.98:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #3457D9 | 3.51:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #3457D9 text on white | 5.98:1 | AA | Lc 79.3 | Fine for body text |
| #3457D9 text on black | 3.51:1 | AA large text | Lc -22.5 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FE
oklch(88.5% 0.054 266.8)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#769BFF
oklch(70.7% 0.152 267.2)
-
Step 500
500
#547EFF
oklch(63.1% 0.197 267)
-
Step 600
600
#3B62F0
oklch(55.6% 0.218 267.1)
-
Step 700
700 (this color)
#3457D9
oklch(51.3% 0.203 267.1)
-
Step 800
800
#2742A9
oklch(42.6% 0.168 267.4)
-
Step 900
900
#233A86
oklch(37.8% 0.131 267.1)
-
Step 950
950
#14234E
oklch(27.1% 0.082 266.5)
#3457D9 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) | #006BDD | 0.049 |
| Deuteranopia (no green cones) | #005CD6 | 0.027 |
| Tritanopia (no blue cones) | #007890 | 0.158 |
| Achromatopsia (no color) | #636363 | 0.203 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3457D9
#3457D9
oklch(51.3% 0.203 267.1)
- #816200
#816200
oklch(51.3% 0.105 86.9)
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 #3457D9, closest first.
No curated palette has a color within ΔE 0.04 of #3457D9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.026
- Azul #1D5DEC ΔE 0.034
- Neon Blue #4361EE ΔE 0.044
- Royal Blue #4169E1 ΔE 0.049
- Blue Blue #2242C7 ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.061
- Bright Blue #0165FC ΔE 0.063
- Electric Blue #0652FF ΔE 0.064
Use #3457D9 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.