#2B3D7F
Closest named color: Twilight Blue (#0A437A). oklch(38.3% 0.114 269), rgb(43, 61, 127).
Aa
White text reads best on this color (10.11:1).
About this color
#2B3D7F is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.114 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.032 away. White text reads best on it, at 10.11:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.07:1 |
| White text | 10.11:1 |
Values
| HEX | #2B3D7F |
| RGB | rgb(43, 61, 127) |
| HSL | hsl(227, 49%, 33%) |
| OKLCH | oklch(38.3% 0.114 269) |
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 #2B3D7F | 10.11:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #2B3D7F | 2.07:1 | Fails | Lc 10.7 | Not readable |
| #2B3D7F text on white | 10.11:1 | AAA | Lc 93.2 | Preferred for body text |
| #2B3D7F text on black | 2.07:1 | Fails | Lc -9.3 | 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 900.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F9
oklch(88.6% 0.046 267.9)
-
Step 300
300
#AABFF9
oklch(80.9% 0.086 269)
-
Step 400
400
#7E9BF5
oklch(70.6% 0.136 269.2)
-
Step 500
500
#5F80F2
oklch(63.2% 0.174 268.9)
-
Step 600
600
#4866E0
oklch(55.7% 0.189 269)
-
Step 700
700
#3A54C3
oklch(49.2% 0.176 269)
-
Step 800
800
#30459D
oklch(42.7% 0.145 269.2)
-
Step 900
900 (this color)
#2B3D7F
oklch(38.3% 0.114 269)
-
Step 950
950
#182349
oklch(26.9% 0.072 269)
#2B3D7F 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) | #184681 | 0.028 |
| Deuteranopia (no green cones) | #023E7E | 0.032 |
| Tritanopia (no blue cones) | #004C58 | 0.095 |
| Achromatopsia (no color) | #424242 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3D7F
#2B3D7F
oklch(38.3% 0.114 269)
- #544000
#544000
oklch(38.2% 0.078 88.5)
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 #2B3D7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.032
- Cobalt #1E488F ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.048
- Light Navy #155084 ΔE 0.054
- Marine Blue #01386A ΔE 0.055
- Blueberry #464196 ΔE 0.057
- Dusk Blue #26538D ΔE 0.064
- Deep Sea Blue #015482 ΔE 0.067
Use #2B3D7F 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.