#1B4F89
Closest named color: Light Navy (#155084). oklch(42.5% 0.111 253.9), rgb(27, 79, 137).
Aa
White text reads best on this color (8.31:1).
About this color
#1B4F89 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.111 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.010 away. White text reads best on it, at 8.31:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.52:1 |
| White text | 8.31:1 |
Values
| HEX | #1B4F89 |
| RGB | rgb(27, 79, 137) |
| HSL | hsl(212, 67%, 32%) |
| OKLCH | oklch(42.5% 0.111 253.9) |
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 #1B4F89 | 8.31:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #1B4F89 | 2.52:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #1B4F89 text on white | 8.31:1 | AAA | Lc 88.3 | Fine for body text |
| #1B4F89 text on black | 2.52:1 | Fails | Lc -13.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#C9DBF1
oklch(88.5% 0.036 253.5)
-
Step 300
300
#A4C4EA
oklch(81% 0.064 253)
-
Step 400
400
#72A4E0
oklch(70.7% 0.103 253.6)
-
Step 500
500
#4C8CD7
oklch(63.2% 0.131 253.8)
-
Step 600
600
#2C74C5
oklch(55.6% 0.144 254)
-
Step 700
700
#1E61AA
oklch(49.1% 0.134 253.9)
-
Step 800
800 (this color)
#1B4F89
oklch(42.5% 0.111 253.9)
-
Step 900
900
#1D426E
oklch(37.6% 0.087 254.4)
-
Step 950
950
#122740
oklch(26.9% 0.054 254)
#1B4F89 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) | #33538B | 0.027 |
| Deuteranopia (no green cones) | #204988 | 0.017 |
| Tritanopia (no blue cones) | #005D65 | 0.084 |
| Achromatopsia (no color) | #4E4E4E | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4F89
#1B4F89
oklch(42.5% 0.111 253.9)
- #6B4600
#6B4600
oklch(42.6% 0.09 74.7)
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 #1B4F89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.010
- Dusk Blue #26538D ΔE 0.017
- Deep Sea Blue #015482 ΔE 0.023
- Cobalt #1E488F ΔE 0.024
- Light Navy Blue #2E5A88 ΔE 0.040
- Twilight Blue #0A437A ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.052
- Twilight #4E518B ΔE 0.060
Use #1B4F89 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.