#133E9E
Closest named color: Sapphire (#2138AB). oklch(40.1% 0.163 263), rgb(19, 62, 158).
Aa
White text reads best on this color (9.50:1).
About this color
#133E9E is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.163 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.026 away. White text reads best on it, at 9.50:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.21:1 |
| White text | 9.50:1 |
Values
| HEX | #133E9E |
| RGB | rgb(19, 62, 158) |
| HSL | hsl(221, 79%, 35%) |
| OKLCH | oklch(40.1% 0.163 263) |
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 #133E9E | 9.50:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #133E9E | 2.21:1 | Fails | Lc 12.7 | Not readable |
| #133E9E text on white | 9.50:1 | AAA | Lc 91.3 | Preferred for body text |
| #133E9E text on black | 2.21:1 | Fails | Lc -11.1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9EFF
oklch(70.8% 0.152 262.8)
-
Step 500
500
#4681FF
oklch(63.1% 0.198 263.1)
-
Step 600
600
#1A60FF
oklch(55.5% 0.245 263)
-
Step 700
700
#0049E9
oklch(49.1% 0.247 263)
-
Step 800
800
#033CBF
oklch(42.7% 0.21 263.1)
-
Step 900
900 (this color)
#133E9E
oklch(40.1% 0.163 263)
-
Step 950
950
#092158
oklch(27% 0.104 263.3)
#133E9E 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) | #004CA1 | 0.035 |
| Deuteranopia (no green cones) | #003F9C | 0.009 |
| Tritanopia (no blue cones) | #005768 | 0.125 |
| Achromatopsia (no color) | #464646 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133E9E
#133E9E
oklch(40.1% 0.163 263)
- #5D4300
#5D4300
oklch(40.1% 0.082 83.4)
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 #133E9E, closest first.
No curated palette has a color within ΔE 0.04 of #133E9E.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.026
- Cobalt #1E488F ΔE 0.039
- Blueberry #464196 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.063
- Blue Blue #2242C7 ΔE 0.069
- Light Navy #155084 ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.070
- Dusk Blue #26538D ΔE 0.070
Use #133E9E 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.