#0F57BA
Closest named color: Blue Blue (#2242C7). oklch(47.7% 0.17 258.7), rgb(15, 87, 186).
Aa
White text reads best on this color (6.79:1).
About this color
#0F57BA is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.170 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.052 away. White text reads best on it, at 6.79:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.09:1 |
| White text | 6.79:1 |
Values
| HEX | #0F57BA |
| RGB | rgb(15, 87, 186) |
| HSL | hsl(215, 85%, 39%) |
| OKLCH | oklch(47.7% 0.17 258.7) |
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 #0F57BA | 6.79:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #0F57BA | 3.09:1 | AA large text | Lc 21.3 | Dividers and decoration only |
| #0F57BA text on white | 6.79:1 | AA | Lc 82.7 | Fine for body text |
| #0F57BA text on black | 3.09:1 | AA large text | Lc -19.2 | 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
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#A0C2F6
oklch(80.8% 0.083 258.7)
-
Step 400
400
#6CA1F2
oklch(70.7% 0.132 258.6)
-
Step 500
500
#4487ED
oklch(63.1% 0.168 258.7)
-
Step 600
600
#236EDC
oklch(55.6% 0.183 258.8)
-
Step 700
700 (this color)
#0F57BA
oklch(47.7% 0.17 258.7)
-
Step 800
800
#154B9A
oklch(42.7% 0.141 258.7)
-
Step 900
900
#18407B
oklch(37.8% 0.11 258.4)
-
Step 950
950
#0F2648
oklch(27.1% 0.07 258.2)
#0F57BA 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) | #0163BE | 0.031 |
| Deuteranopia (no green cones) | #0054B8 | 0.011 |
| Tritanopia (no blue cones) | #007080 | 0.130 |
| Achromatopsia (no color) | #5B5B5B | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F57BA
#0F57BA
oklch(47.7% 0.17 258.7)
- #7B5500
#7B5500
oklch(47.8% 0.099 78.7)
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 #0F57BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.052
- Mid Blue #276AB3 ΔE 0.058
- Dusk Blue #26538D ΔE 0.072
- Denim Blue #3B5B92 ΔE 0.073
- Warm Blue #4B57DB ΔE 0.074
- Cobalt #1E488F ΔE 0.077
- Sapphire #2138AB ΔE 0.077
- Majorelle Blue #3F37C9 ΔE 0.077
Use #0F57BA 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.