#1B4F94
Closest named color: Dusk Blue (#26538D). oklch(43.3% 0.126 257), rgb(27, 79, 148).
Aa
White text reads best on this color (8.09:1).
About this color
#1B4F94 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.126 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.020 away. White text reads best on it, at 8.09:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.59:1 |
| White text | 8.09:1 |
Values
| HEX | #1B4F94 |
| RGB | rgb(27, 79, 148) |
| HSL | hsl(214, 69%, 34%) |
| OKLCH | oklch(43.3% 0.126 257) |
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 #1B4F94 | 8.09:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #1B4F94 | 2.59:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #1B4F94 text on white | 8.09:1 | AAA | Lc 87.6 | Fine for body text |
| #1B4F94 text on black | 2.59:1 | Fails | Lc -14.5 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A3C3F0
oklch(80.9% 0.073 256.9)
-
Step 400
400
#70A2E9
oklch(70.6% 0.118 257.2)
-
Step 500
500
#4989E3
oklch(63.1% 0.151 257.3)
-
Step 600
600
#2971D1
oklch(55.6% 0.164 257.1)
-
Step 700
700
#1B5EB5
oklch(49.1% 0.153 257.1)
-
Step 800
800 (this color)
#1B4F94
oklch(43.3% 0.126 257)
-
Step 900
900
#1B4175
oklch(37.7% 0.099 257.1)
-
Step 950
950
#112644
oklch(26.9% 0.062 257.5)
#1B4F94 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) | #2A5697 | 0.026 |
| Deuteranopia (no green cones) | #0C4B93 | 0.015 |
| Tritanopia (no blue cones) | #005F6A | 0.095 |
| Achromatopsia (no color) | #505050 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4F94
#1B4F94
oklch(43.3% 0.126 257)
- #6C4900
#6C4900
oklch(43.3% 0.091 77.3)
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 #1B4F94, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.020
- Cobalt #1E488F ΔE 0.020
- Light Navy #155084 ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.055
- Blueberry #464196 ΔE 0.057
Use #1B4F94 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.