#1F53AD
Closest named color: Dusk Blue (#26538D). oklch(46.2% 0.155 260.6), rgb(31, 83, 173).
Aa
White text reads best on this color (7.24:1).
About this color
#1F53AD is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.155 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.052 away. White text reads best on it, at 7.24:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.89:1 |
| White text | 7.24:1 |
Values
| HEX | #1F53AD |
| RGB | rgb(31, 83, 173) |
| HSL | hsl(218, 70%, 40%) |
| OKLCH | oklch(46.2% 0.155 260.6) |
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 #1F53AD | 7.24:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #1F53AD | 2.89:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #1F53AD text on white | 7.24:1 | AAA | Lc 84.6 | Fine for body text |
| #1F53AD text on black | 2.89:1 | Fails | Lc -17.4 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A5C2F2
oklch(80.9% 0.075 260.4)
-
Step 400
400
#75A1EB
oklch(70.8% 0.119 260.4)
-
Step 500
500
#5187E5
oklch(63.1% 0.153 260.7)
-
Step 600
600
#356FD3
oklch(55.7% 0.166 260.5)
-
Step 700
700 (this color)
#1F53AD
oklch(46.2% 0.155 260.6)
-
Step 800
800
#224B94
oklch(42.6% 0.129 260.9)
-
Step 900
900
#214076
oklch(37.8% 0.1 260.7)
-
Step 950
950
#142645
oklch(27.1% 0.063 260.6)
#1F53AD 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) | #155EB0 | 0.029 |
| Deuteranopia (no green cones) | #0051AB | 0.016 |
| Tritanopia (no blue cones) | #006978 | 0.119 |
| Achromatopsia (no color) | #575757 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F53AD
#1F53AD
oklch(46.2% 0.155 260.6)
- #745200
#745200
oklch(46.3% 0.096 80.9)
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 #1F53AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.052
- Cobalt #1E488F ΔE 0.055
- Blue Blue #2242C7 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.059
- Mid Blue #276AB3 ΔE 0.065
- Blueberry #464196 ΔE 0.066
- Sapphire #2138AB ΔE 0.066
- Light Navy Blue #2E5A88 ΔE 0.067
Use #1F53AD 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.