#2148A3
Closest named color: Cobalt (#1E488F). oklch(43.1% 0.154 263.7), rgb(33, 72, 163).
Aa
White text reads best on this color (8.33:1).
About this color
#2148A3 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.154 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.033 away. White text reads best on it, at 8.33:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.52:1 |
| White text | 8.33:1 |
Values
| HEX | #2148A3 |
| RGB | rgb(33, 72, 163) |
| HSL | hsl(222, 66%, 38%) |
| OKLCH | oklch(43.1% 0.154 263.7) |
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 #2148A3 | 8.33:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #2148A3 | 2.52:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #2148A3 text on white | 8.33:1 | AAA | Lc 88.2 | Fine for body text |
| #2148A3 text on black | 2.52:1 | Fails | Lc -13.9 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A3C1FC
oklch(81% 0.09 263.6)
-
Step 400
400
#719EFA
oklch(70.7% 0.144 263.4)
-
Step 500
500
#4D82F7
oklch(63.1% 0.184 263.7)
-
Step 600
600
#3268E6
oklch(55.6% 0.2 263.7)
-
Step 700
700
#2556C8
oklch(49.2% 0.186 263.5)
-
Step 800
800 (this color)
#2148A3
oklch(43.1% 0.154 263.7)
-
Step 900
900
#1F3D80
oklch(37.8% 0.119 263.6)
-
Step 950
950
#12244B
oklch(26.9% 0.076 263.5)
#2148A3 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) | #0054A6 | 0.032 |
| Deuteranopia (no green cones) | #0048A1 | 0.018 |
| Tritanopia (no blue cones) | #005F6E | 0.121 |
| Achromatopsia (no color) | #4E4E4E | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2148A3
#2148A3
oklch(43.1% 0.154 263.7)
- #674B00
#674B00
oklch(43.1% 0.089 83.9)
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 #2148A3, closest first.
No curated palette has a color within ΔE 0.04 of #2148A3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.033
- Sapphire #2138AB ΔE 0.040
- Blueberry #464196 ΔE 0.049
- Dusk Blue #26538D ΔE 0.050
- Light Navy #155084 ΔE 0.059
- Blue Blue #2242C7 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.063
- Deep Sea Blue #015482 ΔE 0.069
Use #2148A3 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.