#1F4A7B
Closest named color: Light Navy (#155084). oklch(40.5% 0.095 253.7), rgb(31, 74, 123).
Aa
White text reads best on this color (9.03:1).
About this color
#1F4A7B is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.095 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.021 away. White text reads best on it, at 9.03:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.32:1 |
| White text | 9.03:1 |
Values
| HEX | #1F4A7B |
| RGB | rgb(31, 74, 123) |
| HSL | hsl(212, 60%, 30%) |
| OKLCH | oklch(40.5% 0.095 253.7) |
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 #1F4A7B | 9.03:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #1F4A7B | 2.32:1 | Fails | Lc 13.5 | Not readable |
| #1F4A7B text on white | 9.03:1 | AAA | Lc 90.5 | Preferred for body text |
| #1F4A7B text on black | 2.32:1 | Fails | Lc -11.8 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CBDBEE
oklch(88.5% 0.031 252.7)
-
Step 300
300
#A8C3E5
oklch(80.9% 0.057 254.3)
-
Step 400
400
#79A4D7
oklch(70.7% 0.089 253.2)
-
Step 500
500
#568CCD
oklch(63.1% 0.114 254)
-
Step 600
600
#3A75BA
oklch(55.6% 0.124 253.9)
-
Step 700
700
#2C62A0
oklch(49.1% 0.115 253.8)
-
Step 800
800 (this color)
#1F4A7B
oklch(40.5% 0.095 253.7)
-
Step 900
900
#234368
oklch(37.7% 0.074 253.3)
-
Step 950
950
#15273D
oklch(26.9% 0.048 254.2)
#1F4A7B 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) | #334D7D | 0.024 |
| Deuteranopia (no green cones) | #25457A | 0.015 |
| Tritanopia (no blue cones) | #00555C | 0.073 |
| Achromatopsia (no color) | #494949 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4A7B
#1F4A7B
oklch(40.5% 0.095 253.7)
- #644100
#644100
oklch(40.6% 0.086 74.5)
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 #1F4A7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.021
- Twilight Blue #0A437A ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.031
- Cobalt #1E488F ΔE 0.035
- Dusk Blue #26538D ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.054
- Marine Blue #01386A ΔE 0.066
Use #1F4A7B 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.