#3057B8
Closest named color: Mid Blue (#276AB3). oklch(48.5% 0.16 264.6), rgb(48, 87, 184).
Aa
White text reads best on this color (6.60:1).
About this color
#3057B8 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.160 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.052 away. White text reads best on it, at 6.60:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.18:1 |
| White text | 6.60:1 |
Values
| HEX | #3057B8 |
| RGB | rgb(48, 87, 184) |
| HSL | hsl(223, 59%, 45%) |
| OKLCH | oklch(48.5% 0.16 264.6) |
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 #3057B8 | 6.60:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #3057B8 | 3.18:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #3057B8 text on white | 6.60:1 | AA | Lc 82.2 | Fine for body text |
| #3057B8 text on black | 3.18:1 | AA large text | Lc -19.7 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBD9F6
oklch(88.4% 0.043 265)
-
Step 300
300
#A8C1F4
oklch(81% 0.078 264.3)
-
Step 400
400
#7A9EEE
oklch(70.6% 0.124 265)
-
Step 500
500
#5984E8
oklch(63.1% 0.158 264.8)
-
Step 600
600
#3F6BD6
oklch(55.5% 0.172 264.6)
-
Step 700
700 (this color)
#3057B8
oklch(48.5% 0.16 264.6)
-
Step 800
800
#294996
oklch(42.6% 0.132 264.5)
-
Step 900
900
#253E78
oklch(37.7% 0.104 264.4)
-
Step 950
950
#162546
oklch(27.1% 0.065 264.1)
#3057B8 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) | #1363BB | 0.033 |
| Deuteranopia (no green cones) | #0057B6 | 0.026 |
| Tritanopia (no blue cones) | #006E7F | 0.126 |
| Achromatopsia (no color) | #5D5D5D | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3057B8
#3057B8
oklch(48.5% 0.16 264.6)
- #795900
#795900
oklch(48.4% 0.099 84.2)
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 #3057B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.052
- Blue Blue #2242C7 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.064
- Denim Blue #3B5B92 ΔE 0.064
- French Blue #436BAD ΔE 0.065
- Iris #6258C4 ΔE 0.068
- Dusky Blue #475F94 ΔE 0.070
- Dusk Blue #26538D ΔE 0.071
Use #3057B8 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.