#0F57BD
Closest named color: Blue Blue (#2242C7). oklch(48% 0.174 259), rgb(15, 87, 189).
Aa
White text reads best on this color (6.73:1).
About this color
#0F57BD is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.174 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.050 away. White text reads best on it, at 6.73:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.11:1 |
| White text | 6.73:1 |
Values
| HEX | #0F57BD |
| RGB | rgb(15, 87, 189) |
| HSL | hsl(215, 85%, 40%) |
| OKLCH | oklch(48% 0.174 259) |
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 #0F57BD | 6.73:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #0F57BD | 3.11:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #0F57BD text on white | 6.73:1 | AA | Lc 82.5 | Fine for body text |
| #0F57BD text on black | 3.11:1 | AA large text | Lc -19.4 | 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
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DBF9
oklch(88.6% 0.047 258.4)
-
Step 300
300
#A0C2F7
oklch(80.8% 0.084 259.1)
-
Step 400
400
#6CA1F4
oklch(70.8% 0.135 259.1)
-
Step 500
500
#4387F0
oklch(63.2% 0.172 258.9)
-
Step 600
600
#226DDE
oklch(55.5% 0.187 259.2)
-
Step 700
700 (this color)
#0F57BD
oklch(48% 0.174 259)
-
Step 800
800
#144B9C
oklch(42.8% 0.144 258.9)
-
Step 900
900
#183F7C
oklch(37.6% 0.113 259.2)
-
Step 950
950
#0F2649
oklch(27.2% 0.071 258.7)
#0F57BD 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) | #0063C1 | 0.031 |
| Deuteranopia (no green cones) | #0054BB | 0.010 |
| Tritanopia (no blue cones) | #007081 | 0.132 |
| Achromatopsia (no color) | #5C5C5C | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F57BD
#0F57BD
oklch(48% 0.174 259)
- #7B5600
#7B5600
oklch(48% 0.1 79.7)
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 #0F57BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.050
- Mid Blue #276AB3 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.071
- Majorelle Blue #3F37C9 ΔE 0.075
- Azul #1D5DEC ΔE 0.075
- Dusk Blue #26538D ΔE 0.077
- Denim Blue #3B5B92 ΔE 0.077
- Sapphire #2138AB ΔE 0.078
Use #0F57BD 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.