#1F4EA9
Closest named color: Cobalt (#1E488F). oklch(44.8% 0.155 261.8), rgb(31, 78, 169).
Aa
White text reads best on this color (7.71:1).
About this color
#1F4EA9 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.155 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.044 away. White text reads best on it, at 7.71:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.72:1 |
| White text | 7.71:1 |
Values
| HEX | #1F4EA9 |
| RGB | rgb(31, 78, 169) |
| HSL | hsl(220, 69%, 39%) |
| OKLCH | oklch(44.8% 0.155 261.8) |
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 #1F4EA9 | 7.71:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #1F4EA9 | 2.72:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #1F4EA9 text on white | 7.71:1 | AAA | Lc 86.3 | Fine for body text |
| #1F4EA9 text on black | 2.72:1 | Fails | Lc -15.8 | Dividers and decoration only |
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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A1C1FC
oklch(80.9% 0.091 262.4)
-
Step 400
400
#6D9FFA
oklch(70.7% 0.144 261.6)
-
Step 500
500
#4683F8
oklch(63% 0.186 261.9)
-
Step 600
600
#2969E7
oklch(55.6% 0.202 262)
-
Step 700
700
#1C57C9
oklch(49.2% 0.188 261.8)
-
Step 800
800 (this color)
#1F4EA9
oklch(44.8% 0.155 261.8)
-
Step 900
900
#1A3D81
oklch(37.7% 0.122 261.9)
-
Step 950
950
#10244B
oklch(26.8% 0.077 262.1)
#1F4EA9 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) | #0359AC | 0.029 |
| Deuteranopia (no green cones) | #004DA7 | 0.016 |
| Tritanopia (no blue cones) | #006474 | 0.119 |
| Achromatopsia (no color) | #535353 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4EA9
#1F4EA9
oklch(44.8% 0.155 261.8)
- #6E4E00
#6E4E00
oklch(44.7% 0.092 81.3)
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 #1F4EA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.044
- Dusk Blue #26538D ΔE 0.050
- Sapphire #2138AB ΔE 0.053
- Blue Blue #2242C7 ΔE 0.055
- Blueberry #464196 ΔE 0.057
- Light Navy #155084 ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.063
- Light Navy Blue #2E5A88 ΔE 0.070
Use #1F4EA9 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.