#1A3E9A
Closest named color: Sapphire (#2138AB). oklch(40% 0.156 264.2), rgb(26, 62, 154).
Aa
White text reads best on this color (9.54:1).
About this color
#1A3E9A is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.156 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.031 away. White text reads best on it, at 9.54:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.19:1 |
| White text | 9.54:1 |
Values
| HEX | #1A3E9A |
| RGB | rgb(26, 62, 154) |
| HSL | hsl(223, 71%, 35%) |
| OKLCH | oklch(40% 0.156 264.2) |
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 #1A3E9A | 9.54:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #1A3E9A | 2.19:1 | Fails | Lc 12.5 | Not readable |
| #1A3E9A text on white | 9.54:1 | AAA | Lc 91.5 | Preferred for body text |
| #1A3E9A text on black | 2.19:1 | Fails | Lc -10.9 | Not readable |
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 900.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#709DFF
oklch(70.7% 0.152 264.2)
-
Step 500
500
#4A80FF
oklch(63.1% 0.198 264.2)
-
Step 600
600
#245FFF
oklch(55.6% 0.245 264.2)
-
Step 700
700
#1349E6
oklch(49.1% 0.241 264.1)
-
Step 800
800
#123EBA
oklch(42.8% 0.2 264.2)
-
Step 900
900 (this color)
#1A3E9A
oklch(40% 0.156 264.2)
-
Step 950
950
#0C2156
oklch(26.9% 0.1 264.3)
#1A3E9A 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) | #004B9D | 0.033 |
| Deuteranopia (no green cones) | #004098 | 0.014 |
| Tritanopia (no blue cones) | #005566 | 0.119 |
| Achromatopsia (no color) | #454545 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A3E9A
#1A3E9A
oklch(40% 0.156 264.2)
- #5C4300
#5C4300
oklch(39.9% 0.082 84.4)
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 #1A3E9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.031
- Cobalt #1E488F ΔE 0.034
- Blueberry #464196 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.063
- Light Navy #155084 ΔE 0.065
- Dusk Blue #26538D ΔE 0.066
- Blue Blue #2242C7 ΔE 0.074
Use #1A3E9A 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.