#345DD9
Closest named color: Warm Blue (#4B57DB). oklch(52.5% 0.196 265.9), rgb(52, 93, 217).
Aa
White text reads best on this color (5.65:1).
About this color
#345DD9 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.196 and its hue 266°. 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 5.65:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.196) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #345DD9 |
| RGB | rgb(52, 93, 217) |
| HSL | hsl(225, 68%, 53%) |
| OKLCH | oklch(52.5% 0.196 265.9) |
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 #345DD9 | 5.65:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #345DD9 | 3.71:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #345DD9 text on white | 5.65:1 | AA | Lc 77.7 | Fine for body text |
| #345DD9 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
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FA
oklch(88.5% 0.048 266)
-
Step 300
300
#A6C0FA
oklch(80.9% 0.087 265.8)
-
Step 400
400
#779DF8
oklch(70.8% 0.14 265.8)
-
Step 500
500
#5581F5
oklch(63.1% 0.18 265.8)
-
Step 600
600 (this color)
#345DD9
oklch(52.5% 0.196 265.9)
-
Step 700
700
#2F55C6
oklch(49.2% 0.182 265.8)
-
Step 800
800
#2746A0
oklch(42.7% 0.151 265.8)
-
Step 900
900
#243C7F
oklch(37.7% 0.117 266.1)
-
Step 950
950
#15244A
oklch(27% 0.073 265.6)
#345DD9 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) | #006FDD | 0.045 |
| Deuteranopia (no green cones) | #0060D7 | 0.026 |
| Tritanopia (no blue cones) | #007C92 | 0.154 |
| Achromatopsia (no color) | #676767 | 0.196 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #345DD9
#345DD9
oklch(52.5% 0.196 265.9)
- #866500
#866500
oklch(52.6% 0.108 86.1)
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 #345DD9, closest first.
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 0.032
- Royal Blue #4169E1 ΔE 0.036
- Neon Blue #4361EE ΔE 0.038
- Cerulean Blue #056EEE ΔE 0.051
- Bright Blue #0165FC ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.063
- Iris #6258C4 ΔE 0.064
Use #345DD9 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.