#1F4979
Closest named color: Light Navy (#155084). oklch(40.1% 0.094 253.7), rgb(31, 73, 121).
Aa
White text reads best on this color (9.18:1).
About this color
#1F4979 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.094 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.025 away. White text reads best on it, at 9.18:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.28:1 |
| White text | 9.18:1 |
Values
| HEX | #1F4979 |
| RGB | rgb(31, 73, 121) |
| HSL | hsl(212, 59%, 30%) |
| OKLCH | oklch(40.1% 0.094 253.7) |
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 #1F4979 | 9.18:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #1F4979 | 2.28:1 | Fails | Lc 13.1 | Not readable |
| #1F4979 text on white | 9.18:1 | AAA | Lc 90.9 | Preferred for body text |
| #1F4979 text on black | 2.28:1 | Fails | Lc -11.4 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A1C4EE
oklch(80.9% 0.071 253.2)
-
Step 400
400
#6DA4E5
oklch(70.7% 0.112 253.4)
-
Step 500
500
#448BDE
oklch(63% 0.144 254)
-
Step 600
600
#2074CB
oklch(55.7% 0.155 253.4)
-
Step 700
700
#1160B0
oklch(49% 0.146 253.9)
-
Step 800
800
#134F8E
oklch(42.6% 0.12 253.6)
-
Step 900
900 (this color)
#1F4979
oklch(40.1% 0.094 253.7)
-
Step 950
950
#0F2743
oklch(27% 0.06 253.9)
#1F4979 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) | #334C7B | 0.024 |
| Deuteranopia (no green cones) | #254478 | 0.015 |
| Tritanopia (no blue cones) | #00545B | 0.072 |
| Achromatopsia (no color) | #484848 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4979
#1F4979
oklch(40.1% 0.094 253.7)
- #634000
#634000
oklch(40.2% 0.085 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 #1F4979, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.025
- Twilight Blue #0A437A ΔE 0.025
- Deep Sea Blue #015482 ΔE 0.034
- Cobalt #1E488F ΔE 0.038
- Dusk Blue #26538D ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.058
- Marine Blue #01386A ΔE 0.062
Use #1F4979 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.