#3457BC
Closest named color: Mid Blue (#276AB3). oklch(49% 0.164 266), rgb(52, 87, 188).
Aa
White text reads best on this color (6.49:1).
About this color
#3457BC is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.164 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.054 away. White text reads best on it, at 6.49:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.23:1 |
| White text | 6.49:1 |
Values
| HEX | #3457BC |
| RGB | rgb(52, 87, 188) |
| HSL | hsl(225, 57%, 47%) |
| OKLCH | oklch(49% 0.164 266) |
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 #3457BC | 6.49:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #3457BC | 3.23:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #3457BC text on white | 6.49:1 | AA | Lc 81.8 | Fine for body text |
| #3457BC text on black | 3.23:1 | AA large text | Lc -20.1 | 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 700.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CBD9F7
oklch(88.4% 0.044 265.6)
-
Step 300
300
#A9C0F5
oklch(80.9% 0.079 266.4)
-
Step 400
400
#7B9EF0
oklch(70.8% 0.127 265.7)
-
Step 500
500
#5B83EB
oklch(63.2% 0.162 266.1)
-
Step 600
600
#426AD9
oklch(55.6% 0.176 265.9)
-
Step 700
700 (this color)
#3457BC
oklch(49% 0.164 266)
-
Step 800
800
#2B4898
oklch(42.6% 0.136 265.8)
-
Step 900
900
#273D79
oklch(37.6% 0.106 266.3)
-
Step 950
950
#172447
oklch(26.9% 0.068 266.6)
#3457BC 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) | #0864C0 | 0.037 |
| Deuteranopia (no green cones) | #0058BA | 0.029 |
| Tritanopia (no blue cones) | #006F81 | 0.130 |
| Achromatopsia (no color) | #5E5E5E | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3457BC
#3457BC
oklch(49% 0.164 266)
- #7A5B00
#7A5B00
oklch(49% 0.1 85.4)
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 #3457BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.054
- Warm Blue #4B57DB ΔE 0.056
- Blue Blue #2242C7 ΔE 0.058
- Iris #6258C4 ΔE 0.062
- French Blue #436BAD ΔE 0.066
- Blue With A Hint Of Purple #533CC6 ΔE 0.069
- Denim Blue #3B5B92 ΔE 0.070
- Majorelle Blue #3F37C9 ΔE 0.071
Use #3457BC 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.