#0457B3
Closest named color: Mid Blue (#276AB3). oklch(47% 0.162 256.7), rgb(4, 87, 179).
Aa
White text reads best on this color (6.95:1).
About this color
#0457B3 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.162 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.058 away. White text reads best on it, at 6.95:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.01:1 |
| White text | 6.95:1 |
Values
| HEX | #0457B3 |
| RGB | rgb(4, 87, 179) |
| HSL | hsl(212, 96%, 36%) |
| OKLCH | oklch(47% 0.162 256.7) |
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 #0457B3 | 6.95:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #0457B3 | 3.01:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #0457B3 text on white | 6.95:1 | AA | Lc 83.3 | Fine for body text |
| #0457B3 text on black | 3.01:1 | AA large text | Lc -18.6 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F3
oklch(80.9% 0.078 256.4)
-
Step 400
400
#6CA2EE
oklch(70.7% 0.126 257.1)
-
Step 500
500
#4289E8
oklch(63.1% 0.16 256.6)
-
Step 600
600
#1F70D6
oklch(55.5% 0.174 256.8)
-
Step 700
700 (this color)
#0457B3
oklch(47% 0.162 256.7)
-
Step 800
800
#124D96
oklch(42.7% 0.133 256.6)
-
Step 900
900
#174178
oklch(37.8% 0.105 256.6)
-
Step 950
950
#0F2646
oklch(26.9% 0.066 257.2)
#0457B3 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) | #1661B6 | 0.029 |
| Deuteranopia (no green cones) | #0053B1 | 0.011 |
| Tritanopia (no blue cones) | #006E7C | 0.123 |
| Achromatopsia (no color) | #595959 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0457B3
#0457B3
oklch(47% 0.162 256.7)
- #7A5200
#7A5200
oklch(47.1% 0.099 76.3)
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 #0457B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.058
- Blue Blue #2242C7 ΔE 0.059
- Dusk Blue #26538D ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.066
- Cobalt #1E488F ΔE 0.067
- Peacock Blue #016795 ΔE 0.072
- Light Navy Blue #2E5A88 ΔE 0.074
- Sapphire #2138AB ΔE 0.075
Use #0457B3 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.