#1A3F69
Closest named color: Twilight Blue (#0A437A). oklch(36.4% 0.084 253.5), rgb(26, 63, 105).
Aa
White text reads best on this color (10.72:1).
About this color
#1A3F69 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.084 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.030 away. White text reads best on it, at 10.72:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.95:1 |
| White text | 10.72:1 |
Values
| HEX | #1A3F69 |
| RGB | rgb(26, 63, 105) |
| HSL | hsl(212, 60%, 26%) |
| OKLCH | oklch(36.4% 0.084 253.5) |
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 #1A3F69 | 10.72:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #1A3F69 | 1.95:1 | Fails | Lc 9.3 | Not readable |
| #1A3F69 text on white | 10.72:1 | AAA | Lc 94.6 | Preferred for body text |
| #1A3F69 text on black | 1.95:1 | Fails | Lc -8.0 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF0
oklch(88.5% 0.034 253.7)
-
Step 300
300
#A5C4E9
oklch(81% 0.062 253.1)
-
Step 400
400
#73A4DE
oklch(70.7% 0.1 253.3)
-
Step 500
500
#4D8CD5
oklch(63.1% 0.128 253.5)
-
Step 600
600
#2E74C3
oklch(55.5% 0.141 253.9)
-
Step 700
700
#2061A8
oklch(49% 0.131 253.7)
-
Step 800
800
#1D5088
oklch(42.8% 0.108 253.4)
-
Step 900
900 (this color)
#1A3F69
oklch(36.4% 0.084 253.5)
-
Step 950
950
#122740
oklch(26.9% 0.054 254)
#1A3F69 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) | #2C426B | 0.023 |
| Deuteranopia (no green cones) | #203A68 | 0.015 |
| Tritanopia (no blue cones) | #00494F | 0.065 |
| Achromatopsia (no color) | #3E3E3E | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A3F69
#1A3F69
oklch(36.4% 0.084 253.5)
- #563700
#563700
oklch(36.5% 0.077 74.1)
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 #1A3F69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.030
- Marine Blue #01386A ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.048
- Charcoal #264653 ΔE 0.051
- Midnight Green #073B4C ΔE 0.055
- Marine #042E60 ΔE 0.059
Use #1A3F69 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.