#2F4398
Closest named color: Cobalt (#1E488F). oklch(41.8% 0.141 269.4), rgb(47, 67, 152).
Aa
White text reads best on this color (8.83:1).
About this color
#2F4398 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.141 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.026 away. White text reads best on it, at 8.83:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.37:1 |
| White text | 8.83:1 |
Values
| HEX | #2F4398 |
| RGB | rgb(47, 67, 152) |
| HSL | hsl(229, 53%, 39%) |
| OKLCH | oklch(41.8% 0.141 269.4) |
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 #2F4398 | 8.83:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #2F4398 | 2.37:1 | Fails | Lc 14.1 | Not readable |
| #2F4398 text on white | 8.83:1 | AAA | Lc 89.8 | Fine for body text |
| #2F4398 text on black | 2.37:1 | Fails | Lc -12.4 | 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 800.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F8
oklch(88.6% 0.045 268.7)
-
Step 300
300
#ABBFF7
oklch(80.9% 0.083 269.3)
-
Step 400
400
#809CF3
oklch(70.8% 0.132 269.3)
-
Step 500
500
#6180EE
oklch(63.1% 0.168 269.3)
-
Step 600
600
#4A66DD
oklch(55.5% 0.184 269.5)
-
Step 700
700
#3C54C0
oklch(49.1% 0.171 269.6)
-
Step 800
800 (this color)
#2F4398
oklch(41.8% 0.141 269.4)
-
Step 900
900
#2B3C7B
oklch(37.8% 0.109 269.3)
-
Step 950
950
#192348
oklch(26.9% 0.07 269.8)
#2F4398 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) | #004F9B | 0.039 |
| Deuteranopia (no green cones) | #004696 | 0.033 |
| Tritanopia (no blue cones) | #005767 | 0.114 |
| Achromatopsia (no color) | #4A4A4A | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4398
#2F4398
oklch(41.8% 0.141 269.4)
- #5F4900
#5F4900
oklch(41.7% 0.085 88.8)
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 #2F4398, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Blueberry #464196 ΔE 0.032
- Dark Slate Blue #483D8B ΔE 0.042
- Sapphire #2138AB ΔE 0.045
- Dusk Blue #26538D ΔE 0.050
- Light Navy #155084 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.061
- Twilight #4E518B ΔE 0.066
Use #2F4398 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.