#0051B2
Closest named color: Blue Blue (#2242C7). oklch(45.6% 0.169 258), rgb(0, 81, 178).
Aa
White text reads best on this color (7.44:1).
About this color
#0051B2 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.169 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.049 away. White text reads best on it, at 7.44:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.81:1 |
| White text | 7.44:1 |
Values
| HEX | #0051B2 |
| RGB | rgb(0, 81, 178) |
| HSL | hsl(213, 100%, 35%) |
| OKLCH | oklch(45.6% 0.169 258) |
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 #0051B2 | 7.44:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #0051B2 | 2.81:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #0051B2 text on white | 7.44:1 | AAA | Lc 85.0 | Fine for body text |
| #0051B2 text on black | 2.81:1 | Fails | Lc -17.0 | Dividers and decoration only |
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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C3DBFE
oklch(88.5% 0.055 257.7)
-
Step 300
300
#9AC3FF
oklch(81% 0.096 257.8)
-
Step 400
400
#60A0FF
oklch(70.6% 0.155 258.1)
-
Step 500
500
#2D85FF
oklch(63.2% 0.199 257.9)
-
Step 600
600
#006CE8
oklch(55.6% 0.205 258)
-
Step 700
700
#005AC5
oklch(49.1% 0.183 258.1)
-
Step 800
800 (this color)
#0051B2
oklch(45.6% 0.169 258)
-
Step 900
900
#073E85
oklch(37.7% 0.131 257.9)
-
Step 950
950
#08254E
oklch(27% 0.083 258)
#0051B2 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) | #005DB5 | 0.032 |
| Deuteranopia (no green cones) | #004EB0 | 0.008 |
| Tritanopia (no blue cones) | #006979 | 0.127 |
| Achromatopsia (no color) | #555555 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0051B2
#0051B2
oklch(45.6% 0.169 258)
- #734F00
#734F00
oklch(45.5% 0.095 78.4)
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 #0051B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.049
- Sapphire #2138AB ΔE 0.059
- Cobalt #1E488F ΔE 0.059
- Dusk Blue #26538D ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.074
- Mid Blue #276AB3 ΔE 0.074
- Light Navy #155084 ΔE 0.075
- Majorelle Blue #3F37C9 ΔE 0.075
Use #0051B2 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.