#157DC3
Closest named color: Windows Blue (#3778BF). oklch(57.1% 0.138 245.5), rgb(21, 125, 195).
Aa
Black text reads best on this color (4.75:1).
About this color
#157DC3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.138 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.020 away. Black text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.75:1 |
| White text | 4.41:1 |
Values
| HEX | #157DC3 |
| RGB | rgb(21, 125, 195) |
| HSL | hsl(204, 81%, 42%) |
| OKLCH | oklch(57.1% 0.138 245.5) |
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 #157DC3 | 4.41:1 | AA large text | Lc -75.6 | Fine for body text |
| Black text on #157DC3 | 4.75:1 | AA | Lc 34.0 | Non-text elements, placeholder text |
| #157DC3 text on white | 4.41:1 | AA large text | Lc 70.1 | Content text, not long reading |
| #157DC3 text on black | 4.75:1 | AA | Lc -31.6 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF5
oklch(93.5% 0.018 245.4)
-
Step 200
200
#C7DCEF
oklch(88.5% 0.035 245.5)
-
Step 300
300
#A0C5E7
oklch(80.8% 0.062 246.4)
-
Step 400
400
#6AA7DB
oklch(70.8% 0.099 245.5)
-
Step 500
500
#3C90D1
oklch(63.2% 0.127 245.3)
-
Step 600
600 (this color)
#157DC3
oklch(57.1% 0.138 245.5)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#045385
oklch(42.8% 0.106 245.3)
-
Step 900
900
#12456A
oklch(37.7% 0.082 244.9)
-
Step 950
950
#0D293E
oklch(27.1% 0.052 244.2)
#157DC3 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) | #5B80C6 | 0.055 |
| Deuteranopia (no green cones) | #4271C2 | 0.039 |
| Tritanopia (no blue cones) | #008E97 | 0.096 |
| Achromatopsia (no color) | #787878 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #157DC3
#157DC3
oklch(57.1% 0.138 245.5)
- #A96500
#A96500
oklch(57% 0.127 65.6)
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 #157DC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.020
- Water Blue #0E87CC ΔE 0.029
- Nice Blue #107AB0 ΔE 0.030
- Steel Blue #4682B4 ΔE 0.043
- Cool Blue #4984B8 ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.047
- Blue NCS #118AB2 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.054
Use #157DC3 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.