#1573A3
Closest named color: Ocean Blue (#03719C). oklch(52.8% 0.11 238), rgb(21, 115, 163).
Aa
White text reads best on this color (5.23:1).
About this color
#1573A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.110 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.014 away. White text reads best on it, at 5.23:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 4.01:1 |
| White text | 5.23:1 |
Values
| HEX | #1573A3 |
| RGB | rgb(21, 115, 163) |
| HSL | hsl(200, 77%, 36%) |
| OKLCH | oklch(52.8% 0.11 238) |
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 #1573A3 | 5.23:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #1573A3 | 4.01:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #1573A3 text on white | 5.23:1 | AA | Lc 75.5 | Fine for body text |
| #1573A3 text on black | 4.01:1 | AA large text | Lc -26.2 | 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 600.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1EBF2
oklch(93.5% 0.014 238)
-
Step 200
200
#C9DCEA
oklch(88.5% 0.028 239.7)
-
Step 300
300
#A4C6DD
oklch(80.9% 0.049 237.8)
-
Step 400
400
#70A8CD
oklch(70.7% 0.08 238.4)
-
Step 500
500
#4792C0
oklch(63.2% 0.102 238.2)
-
Step 600
600 (this color)
#1573A3
oklch(52.8% 0.11 238)
-
Step 700
700
#126894
oklch(49.2% 0.103 238)
-
Step 800
800
#145578
oklch(42.8% 0.085 237.9)
-
Step 900
900
#194660
oklch(37.6% 0.066 237.6)
-
Step 950
950
#102938
oklch(26.9% 0.042 237.4)
#1573A3 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) | #5C73A5 | 0.060 |
| Deuteranopia (no green cones) | #4967A2 | 0.048 |
| Tritanopia (no blue cones) | #007F84 | 0.070 |
| Achromatopsia (no color) | #6C6C6C | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1573A3
#1573A3
oklch(52.8% 0.11 238)
- #9A591F
#9A591F
oklch(52.9% 0.111 57.9)
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 #1573A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.014
- Muted Blue #3B719F ΔE 0.023
- Sea Blue #047495 ΔE 0.025
- Nice Blue #107AB0 ΔE 0.026
- Flat Blue #3C73A8 ΔE 0.027
- Dull Blue #49759C ΔE 0.040
- Peacock Blue #016795 ΔE 0.040
- Mid Blue #276AB3 ΔE 0.041
Use #1573A3 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.