#3357B5
Closest named color: Mid Blue (#276AB3). oklch(48.4% 0.155 265.2), rgb(51, 87, 181).
Aa
White text reads best on this color (6.62:1).
About this color
#3357B5 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.155 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.051 away. White text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.17:1 |
| White text | 6.62:1 |
Values
| HEX | #3357B5 |
| RGB | rgb(51, 87, 181) |
| HSL | hsl(223, 56%, 45%) |
| OKLCH | oklch(48.4% 0.155 265.2) |
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 #3357B5 | 6.62:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #3357B5 | 3.17:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #3357B5 text on white | 6.62:1 | AA | Lc 82.3 | Fine for body text |
| #3357B5 text on black | 3.17:1 | AA large text | Lc -19.6 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#A9C0F2
oklch(80.8% 0.075 265.5)
-
Step 400
400
#7C9EEC
oklch(70.6% 0.121 265.5)
-
Step 500
500
#5C84E5
oklch(63% 0.153 265.4)
-
Step 600
600
#436CD4
oklch(55.7% 0.167 265.2)
-
Step 700
700 (this color)
#3357B5
oklch(48.4% 0.155 265.2)
-
Step 800
800
#2C4994
oklch(42.6% 0.128 265.4)
-
Step 900
900
#273E76
oklch(37.7% 0.1 265.2)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#3357B5 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) | #1B63B8 | 0.033 |
| Deuteranopia (no green cones) | #0057B3 | 0.029 |
| Tritanopia (no blue cones) | #006D7D | 0.124 |
| Achromatopsia (no color) | #5D5D5D | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3357B5
#3357B5
oklch(48.4% 0.155 265.2)
- #785900
#785900
oklch(48.3% 0.099 85)
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 #3357B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.060
- Blue Blue #2242C7 ΔE 0.062
- French Blue #436BAD ΔE 0.063
- Dusky Blue #475F94 ΔE 0.065
- Warm Blue #4B57DB ΔE 0.066
- Iris #6258C4 ΔE 0.067
- Dusk Blue #26538D ΔE 0.067
Use #3357B5 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.