#1B4A79
Closest named color: Light Navy (#155084). oklch(40.2% 0.094 251.4), rgb(27, 74, 121).
Aa
White text reads best on this color (9.12:1).
About this color
#1B4A79 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.094 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.023 away. White text reads best on it, at 9.12:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.30:1 |
| White text | 9.12:1 |
Values
| HEX | #1B4A79 |
| RGB | rgb(27, 74, 121) |
| HSL | hsl(210, 64%, 29%) |
| OKLCH | oklch(40.2% 0.094 251.4) |
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 #1B4A79 | 9.12:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #1B4A79 | 2.30:1 | Fails | Lc 13.3 | Not readable |
| #1B4A79 text on white | 9.12:1 | AAA | Lc 90.7 | Preferred for body text |
| #1B4A79 text on black | 2.30:1 | Fails | Lc -11.6 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBED
oklch(88.5% 0.03 251.3)
-
Step 300
300
#A7C4E4
oklch(81% 0.055 251.1)
-
Step 400
400
#77A4D6
oklch(70.6% 0.088 251.7)
-
Step 500
500
#538DCB
oklch(63.1% 0.112 251.5)
-
Step 600
600
#3676B8
oklch(55.6% 0.122 251.5)
-
Step 700
700
#28639F
oklch(49.1% 0.114 251.6)
-
Step 800
800 (this color)
#1B4A79
oklch(40.2% 0.094 251.4)
-
Step 900
900
#214367
oklch(37.6% 0.074 251.6)
-
Step 950
950
#14283C
oklch(27.1% 0.046 249.9)
#1B4A79 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) | #344D7B | 0.028 |
| Deuteranopia (no green cones) | #264478 | 0.019 |
| Tritanopia (no blue cones) | #00555B | 0.071 |
| Achromatopsia (no color) | #484848 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4A79
#1B4A79
oklch(40.2% 0.094 251.4)
- #653F00
#653F00
oklch(40.3% 0.087 71.3)
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 #1B4A79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.023
- Twilight Blue #0A437A ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.031
- Cobalt #1E488F ΔE 0.039
- Dusk Blue #26538D ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.056
- Marine Blue #01386A ΔE 0.063
Use #1B4A79 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.