#2F459E
Closest named color: Cobalt (#1E488F). oklch(42.7% 0.147 268.9), rgb(47, 69, 158).
Aa
White text reads best on this color (8.51:1).
About this color
#2F459E is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.147 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.031 away. White text reads best on it, at 8.51:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.46:1 |
| White text | 8.51:1 |
Values
| HEX | #2F459E |
| RGB | rgb(47, 69, 158) |
| HSL | hsl(228, 54%, 40%) |
| OKLCH | oklch(42.7% 0.147 268.9) |
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 #2F459E | 8.51:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #2F459E | 2.46:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #2F459E text on white | 8.51:1 | AAA | Lc 88.9 | Fine for body text |
| #2F459E text on black | 2.46:1 | Fails | Lc -13.3 | 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
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9FA
oklch(88.6% 0.048 268.4)
-
Step 300
300
#AABFF9
oklch(80.9% 0.086 269)
-
Step 400
400
#7D9BF6
oklch(70.6% 0.138 268.9)
-
Step 500
500
#5E80F2
oklch(63.2% 0.175 268.5)
-
Step 600
600
#4766E1
oklch(55.7% 0.19 268.8)
-
Step 700
700
#3953C3
oklch(49% 0.177 268.9)
-
Step 800
800 (this color)
#2F459E
oklch(42.7% 0.147 268.9)
-
Step 900
900
#293B7D
oklch(37.6% 0.114 268.9)
-
Step 950
950
#182349
oklch(26.9% 0.072 269)
#2F459E 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) | #0052A1 | 0.040 |
| Deuteranopia (no green cones) | #00489C | 0.031 |
| Tritanopia (no blue cones) | #005B6A | 0.121 |
| Achromatopsia (no color) | #4D4D4D | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F459E
#2F459E
oklch(42.7% 0.147 268.9)
- #624C00
#624C00
oklch(42.8% 0.087 89.5)
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 #2F459E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.031
- Blueberry #464196 ΔE 0.034
- Sapphire #2138AB ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.048
- Dusk Blue #26538D ΔE 0.050
- Light Navy #155084 ΔE 0.059
- Twilight #4E518B ΔE 0.066
- Blue Blue #2242C7 ΔE 0.067
Use #2F459E 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.